Hi, sorry for the late reply.
You might gather up your hw/fw/kernel wpa_supplicant hostapd info and try the linux-wireless mailing list, as these are recent changes maybe there are still some bugs. I would include the network profile, and the hostapd config as well, and if you are able to get some more verbose messages that could help.... maybe mount -t debugfs none /sys/kernel and poke around in there or look at modinfo rtw88; /sys/module/rtw88/parameters. Does the authentication just time out, any deauth or dissasoc disconnected messages?
Unfortunately the AP does not give any access to hostapd-logs, and afaik AVM uses some own implementation.
The authentication just times out, I will ask on linux-wireless. BR Bjoern
