Windows 11 Booting Ubuntu 20.04 – Step by step Guide
How to Boot Ubuntu 20.04 Focal LTS OS from CD/USB Drive in a Windows 11 Computer – Step by step Tutorial.
And to Boot Ubuntu 20.04 on Windows 11 PCs is Easy following the below Visual Instructions.

1. Burning Ubuntu ISO
How to Burn Ubuntu ISO to CD/USB
2. Booting in Recovery Mode
First, Access the Advanced Startup
Start the Search App::3. Loading Ubuntu OS
Next to Boot from Ubuntu CD/USB Media
After Reboot Select “Use a device“:
Finally, your System should be able to Startup with the Ubuntu 20.04 GNU/Linux ISO Media! :)