Pro tip: Canonical provides recent kernels for all LTS releases. it's a meta package with rolling updates. 1 apt command and you're set. Full support.

On ubuntu 18.04 or before you could/should do this : sudo apt-get install --install-recommends linux-generic-hwe-18.04 xserver-xorg-hwe-18.04

Starting with 20.04 it's by default so you don't even need it IIRC.