Yes, WiFi works in recovery;
WiFi doesn't work in standard MacOS;
I don't understand.
I can tell you the steps that I have done but that I have not understood:
1) update to Monterey 12.1 with Little Snitch disabled but installed, WiFi worked;
2) to test the system I rebooted the hack, Llittle Snitch disable but installed WiFi doesn't work;
3) removed Llittle Snitch and reboot the system, WiFi doesn't work;
4) connected the router to the hack by wired, logged to the router and changed the channel of the WiFi;
5) A Miracle happened, WiFi works both with static and dynamic IP.
In the end I'm not able to understand what was the matter, for now I stay with OpenCore 0.7.5. In the next days I will test OpenCore 0.7.6, and I would like to reinstall little snitch.
Thanks for the advice you gave me.