I have two Archer C6 routers one is a v2 and the other v3.2. The v2 is running 22.02.1 but the v3.2 is only supported in SNAPSHOT so I’ve left it running stock.
I’m finding the inconsistencies between the two a bit jarring and I’d like to revert the v2 back to stock until both are supported in stable OpenWrt releases.
I found This topic, but it only talks about 19.07.x and it’s not clear whether I would have to TFTP, or if I can just upload the stock firmware through LUCI.
Sorry about your router issues. I have some untested ideas which may be risky. Those steps are acclaimed to have successfully reverted firmware on another TP-Link device. Let me know if you are interested.