Hello. I have been thinking about getting a new WiFi router as I have WiFi coverage issues with 2 APs (and RPi 1 + TL-WN7200ND ) I have right now (I currently live in a house with concrete walls, so yeah) and possibly to replace my current router which is an old x86 computer with OpenWRT in KVM, which works fine for my 300/300Mbps internet, but is noisy, clunky and consumes a lot of power. Since it's 2021, I thought that WiFi 6 is must-have in new router and I actually have devices that already support it (I have wired ethernet wherever I need, and also to my APs rn, so my WiFi devices are mostly phones/tablets and a bit of IoT devices), and I want it running OpenWRT for the security and because I found WiFi roaming to be working quite well with the routers I have.
I have been browsing Aliexpress recently and have seen several MT7621 + MT7905/MT7975 routers for about 50€. Are they a good choice at that price and how supportable are they by OpenWRT right now? I'd guess something like Redmi AX5/AX6 would be more interesting, but it's uncertain when they will be officially supported (or are they going to be supported soon and should I may be wait for them?) and if everything is already supported, there are no pitfalls in MT7621 routers (e.g. secure boot) and it's just a case of constructing a proper dtb and stuff like that, perhaps I could even try to add that support myself.
If there are better alternatives, I'm not comfortable on spending more than 50€ and I need something that can be bought in Europe (or easily imported)