find which version of ubuntu Linux Mint is based on

 Via https://www.baeldung.com/linux/mint-ubuntu-base-check

Either

cat /etc/upstream-release/lsb-release

or

inxi -Sx

or

System Reports in the UI - System Information tab

Linux Mint 21, for example, is based on Ubuntu 22.04 while Mint 22 is based on Ubuntu 24.04