If you have a brand new laptop (2024+ Intel chip), you may need to install a mainline kernel (see troubleshooting section).
Intel “just works” on modern Ubuntu versions. If it doesn’t, your kernel may be too old. install wifi driver ubuntu
Most driver installation guides tell you to run sudo apt install [driver-name] . But if you don’t have WiFi, you can’t download the driver. If you have a brand new laptop (2024+
Install a newer kernel via Mainline: