Raspberry Pi 4 B on 21.02.3 - Trying to use it as simple AP but can't use 2.4GHz?

[seemebreakthis]

Resolved:

Rpi4 < $(community_build)

@neil1 just ran some quick tests and the stock-os/driver init issues seem to be prevalent with 11g... selecting 'Legacy' allows me to establish operational 11g(b?)-AP...

Actually read it before posting my question, but I thought they were referring to the "Allow legacy 802.11b rates" option. But no, there is actually a selection to change the wireless mode from "AC" to "N" or "Legacy". "N" doesn't work at all. "Legacy" does.

The signal quality is actually not that bad. I believe it is an adequate travel router to let a few laptops / mobile phones connect to the internet. Tried 2 simultaneous connection with no problem. Range is also ok.