How to fix Wifi Connectivity Issues on BigSur?

I have daily problems with the connectivity on Intel Bigsur, At some point its just stops, and curiously happens more often during night. If shutting down the computer, then works again for a couple of hours.

The problem is not on the Router, because while failing connectivity on the Mac, same Wifi works perfectly on the iPhone and on the iPad swell.

Wat I have tried?

Turn Off Wifi on the menu bar does not fix it.

-Forget connection, shut down the computer, Start Safe mode, reset Pram and SMC just fix it temporally.

Help