Asus TUF Gaming AX6000 support

This router does not support Wi-Fi 6E (I believe you're asking about Wi-Fi 6E - extension of Wi-Fi 6 (802.11ax) that operates on the 6 GHz band).
Asus TUF-AX6000 is a Wi-Fi 6 router that operates only on the 2.4 GHz and 5 GHz bands.

Did you set the "Country Code" in your Wi-Fi router settings?

When enabling Wi-Fi, it is mandatory to set the correct country code where your router is located.

Thats weird, i'm confused, why is advertised as a wifi 6 router then?

Yes my country code is set properly.

Wi-Fi 6 (802.11ax) as the successor of Wi-Fi 5 technology (802.11ac) does NOT imply that it operates on the 6 GHz band just because it includes the digit 6 in its name.
It is advertised correctly as a Wi-Fi 6 router (802.11ax). For 6 GHz band you need Wi-Fi 6E or Wi-Fi 7 router.

According to the published specs, your iPhone 15 Pro Max is a "Wi‑Fi 6E (802.11ax) with 2x2 MIMO" device. Getting only 400 Mbps on a speedtest is definitely not normal, assuming that your WAN connection is faster than that.

Having said that, the default wifi-device config is correct (and must say 5g for a 5 GHz radio), except for country codes.

I suggest trying a different (hopefully less congested) channel. In most countries where channel 100 is valid at all, it is worth trying.

Tried that and the wifi ssid disappears, back to my correct country code and speeds are the same, any other suggestions?

Whats your max wan speed?
What speed does your iPhone connect to the router?

140

Im using iperf3 to test the speed so its local, i don’t understand the 2nd question.

This shows if the client connects on 20/40/80/160Mhz and that tells the Maximum speed it can get

Also post the results from app
You can also post A [code] from your wireless config. Without macs and passwords

Ive got this router and the speeds are ok

Channel 100 is a DFS channel. It requires that the router waits for a minute before enabling it, and only enables it if no radar pulses are detected.

So, try again and wait one minute before saying "it doesn't work". Then the AP should come up again, you just need one minute of waiting.

I waited bro, it wont show up.

HYG

For the iPhone:

2268.5 Mbit/s, 160 MHz, HE-MCS 11, HE-NSS 2, HE-GI 1 (sometimes this becomes 24.0 Mbit/s, 20 MHz

2401.9 Mbit/s, 160 MHz, HE-MCS 11, HE-NSS 2

The results from the app shows 445Mbits MAX. to a device connected via 1Gbit cable.

`

 config wifi-device 'radio0'
        option type 'mac80211'
        option path 'platform/soc/18000000.wifi'
        option channel '8'
        option band '2g'
        option country 'EG'
        option legacy_rates '1'
        option cell_density '0'
        option he_su_beamformee '1'
        option he_bss_color '8'

config wifi-iface 'default_radio0'
        option device 'radio0'
        option network 'vlan20'
        option mode 'ap'
        option ssid 'Fearz'
        option encryption 'sae-mixed'
        option key ''

config wifi-device 'radio1'
        option type 'mac80211'
        option path 'platform/soc/18000000.wifi+1'
        option channel '64'
        option band '5g'
        option htmode 'HE160'
        option country 'EG'
        option cell_density '3'

config wifi-iface 'default_radio1'
        option device 'radio1'
        option mode 'ap'
        option ssid 'Fearz5G'
        option encryption 'sae-mixed'
        option he_su_beamformee '1'
        option he_bss_color '8'
        option network 'vlan20'
        option key '*'
        option short_preamble '0'
        option disassoc_low_ack '0'
        option ieee80211r '1'
        option ft_over_ds '1'

config wifi-iface 'wifinet2'
        option device 'radio0'
        option mode 'ap'
        option ssid 'Fearz_Guests'
        option encryption 'psk2'
        option network 'lan guest'
        option key '*'

config wifi-iface 'wifinet3'
        option device 'radio0'
        option mode 'ap'
        option ssid 'Fearz_iOT'
        option encryption 'psk-mixed+tkip+ccmp'
        option key '*'
        option ieee80211w '1'
        option network 'vlan20'

config wifi-iface 'wifinet4'
        option device 'radio1'
        option mode 'ap'
        option ssid 'Fearz5G_iOT'
        option encryption 'psk2+ccmp'
        option key '*'
        option network 'vlan20'

`

What's your country? Maybe channel 100 is not valid there?

Please set the country for both radios to the correct value and run this command:

iw reg get

I will then figure out whether channel 100 was a valid proposal and suggest alternatives.

root@OpenWrt:~# iw reg get
global
country EG: DFS-ETSI
(2402 - 2483 @ 40), (N/A, 20), (N/A)
(5150 - 5250 @ 80), (N/A, 23), (N/A), AUTO-BW
(5250 - 5350 @ 80), (N/A, 20), (0 ms), DFS, AUTO-BW
(57000 - 66000 @ 2160), (N/A, 40), (N/A)

root@OpenWrt:~#

OK, then channel 100 (5500 MHz) was indeed invalid.

Try channels 36 and 52. Keep the fastest of the two. Make sure to use the full 80 MHz bandwidth. Other options don't make much sense in Egypt.

Channel 52 requires DFS, thus you need to wait 1 minute for the AP to come up on it.

80 or 160? I have 160

160 MHz is not permitted in Egypt, according to the output you posted.

just tried with 80, almost same speeds.

try changing the encryption to psk2+ccmp
also "2401.9 Mbit/s, 160 MHz, HE-MCS 11, HE-NSS 2" is a very good result so the router and phone have a good connection

That's because the kernel understood that it cannot use 160 MHz and automatically narrowed the bandwidth down.

Have you tried both channels? DFS channels are usually more clean and permit higher speeds.

Another useful metric to get is the signal level (displayed on the Network > Wireless page). E.g., in the example below, the phone is heard by the AP with the strength of -52 dBm.

tried 52, 64...
theres something strange that it fluctuates on 24.0 Mbit/s, 20 MHz every couple of seconds..
not stable..is that normal?
the dBm is between -52 & -60 - im just next to the router almost.