Canonical announced some time ago their Steam Snap which was promoted as stable with Ubuntu 23.04, as they continue to push their own packaging format with Snap but it seems this has been causing problems for Valve.
The day they started pushing snaps into APT and making it a pain to choose the non-snap version... I left Ubuntu. If I wanted to install the snap I would've used snap install not apt install
Yeah before I use Ubuntu. my first exposure on Linux is Linux Mint and it seems Linux Mint support secure boot atm. if this gets worst. I will go back to linux Mint again