My computer had Endless OS 3.3.20-nexthw1 and wi-fi was working.
I had some other problems:
1- TLS Certificate problem: TLS certificate
the solution was updating the OS.
but;
2- It was not possible. OS Version 3.3.20-nexthw1 (200116-021118) - Can't Update to Anything
So, I downloaded Endless 4 and created a bootable USB drive and installed it.
Now, I can neither go back to 3.3.20-nexthw1 nor install wireless driver…