I also lost functionality when I updated my kernel to 6.6. I think that these are related issues:
https://www.thegoodpenguin.co.uk/blog/stop-using-sys-class-gpio-its-deprecated/
https://www.domoticz.com/forum/viewtopic.php?t=42141
https://forums.raspberrypi.com/viewtopic.php?t=367548