Ubuntu does not see Wifi adapter in Lenovo Ideapad, what should I do?

Question

ubuntu

I installed Ubuntu and the Internet does not work. It may not work because of the driver, but I don’t know for sure

Answer 1

First you need to find out if Ubuntu actually sees adapters at all, because if it's 20.04, then it doesn't.
lspci | grep -i 'net'
And then look.
Maybe netplan did not pick up the network after installation, then just fix it with your hands.
A bunch of troubles can be.

Answer 2

during installation, did you forget to check the "third-party software" checkbox?