So I’ve been trying a LOT to get Ubuntu working on my CM4
So What I’ve thanked about is installing a VM
Or running it bear metal.
Plz help me 
You don’t want to run Ubuntu inside a VM on a Raspberry… 
Just get Ubuntu for Raspberry Pi here: Ubuntu for Raspberry Pi | Ubuntu
They even have a video linked there that explains how to install it.
I’ve try to flash the original TF card with Raspberry Imager, and everything went on well with the flashing, but when I put back the TF card to Uconsole, it just don’t boot up