So the thing with Debian and any Debian based distro like Ubuntu or Linux Mint is there is no big centralized software repo like the AUR.
There is https://pacstall.dev/ the AUR for Ubuntu. It has a Lemmy community https://lemmy.ml/c/pacstallAnd there is PPA for Ubuntu. With the Arch AUR anyone can just upload something, and it is up to you to check whether it is uploaded malware or not. Sure, you can check how many others upvoted an AUR package but that is still no guarantee it is safe.