in the WUI, /logs/system logs/wireless
I have the same card and it works well. I would delete the hostapd.conf and let the WUI rebuild it from scratch. I use the config listed here:
https://wiki.ipfire.org/hardware/networking.
Here a discussion:
https://community.ipfire.org/t/nrg-system-ipu662-wlan-module-wle600vx-802-11ac-operating-modes/3706
and another useful link:
https://teklager.se/en/knowledge-base/ipfire-wifi-blue-interface-configuration-instructions/