iPhone and iPad can't connect to Wi-Fi

I have a Linksys WRT3200/ACM with OpenWRT 19.07.3. It has been working for over 4 years but I bought an iRobot and found that it could not login. This seemed to be related to bugs in the authentication so I purchased a used, identical router and set it up with 23.05.3 and swapped them Since then my iRobot works, but my iPhone and iPad (Version 17.6.1) have stopped working.

I saw here sombody suggested setting security to WPA2-PSK only. This did not help. I then tried all settings using WPA2-PSK or better. None of them worked with iDevices. My Linux systems, Macs, smart home devices, streaming devices, etc. all work fine on any of these.

Is there something special I need to set to support iDevices? Short of running both routers for different networks, anything else to try?

Gary

irobot refuses to connect to WPA3 and says WPA1 or TKIP is "slow" while using wifi-G.
Make a separate access point for it.
And for apple (and essentially any other non-embedded device out there) this would work: https://support.apple.com/en-us/102766

Please connect to your OpenWrt device using ssh and copy the output of the following commands and post it here using the "Preformatted text </> " button:
grafik
Remember to redact passwords, MAC addresses and any public IP addresses you may have:

ubus call system board
cat /etc/config/network
cat /etc/config/wireless
cat /etc/config/dhcp
cat /etc/config/firewall
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