I’m good with cinnamon myself, but you can totally install KDE on mint instead. It is just Linux after all.

When I do a search for mint kde, this is the first result and has step by step instructions. It looks like it can be as simple as apt install kde-standard or kde-full.

https://linuxiac.com/how-to-install-kde-plasma-on-linux-mint-22/

I’m tempted, and I may mess with it some day, but honestly after tweaking some settings I’m pretty happy with how my cinnamon desktop performs.