In that case, I will take a guess at 5.8 kernel.
Please grab these packages and transfer them to the computer:
http://archive.ubuntu.com/ubuntu/pool/main/l/linux-hwe-5.8/linux-headers-5.8.0-67-generic_5.8.0-67.75_amd64.deb
https://mirrors.wikimedia.org/ubuntu/ubuntu/pool/main/l/linux-signed-hwe-5.8/linux-image-5.8.0-67-generic_5.8.0-67.75_amd64.deb
http://ppa.launchpad.net/canonical-kernel-team/ppa/ubuntu/pool/main/l/linux-hwe-5.8/linux-modules-5.8.0-67-generic_5.8.0-67.75_amd64.deb
http://ppa.launchpad.net/canonical-kernel-team/ppa/ubuntu/pool/main/l/linux-hwe-5.8/linux-modules-extra-5.8.0-67-generic_5.8.0-67.75_amd64.deb
Move them to a folder in your Home Folder named kernel
Cd into it:
cd ~/kernel
Run the installation of all:
sudo dpkg -i *.deb
Reboot, then test installing your wifi driver with DKMS



