I am using OpenWrt 22.03.0-rc5 on a TP-Link Archer C6 V3.0.
However, the cell phones at home can't connect to the Wifi, only the laptops. We have other two devices (a TP-Link Archer C6 V2.0, and a TP-Link Archer C60 V3.0) with the very same OpenWRT release, and they are working smoothly.
I have tried the very same Wifi configuration, changed channels, criptography, frequencies on the C6 V3.0, but no success.
Sorry to read about your cell phones. There are multiple possibilities. Please post images of your cell phone connection attempts and your setup details. Is it possible for your cell to connect this network without password? I have experienced this problem with Apple iPhone.