Is there something like the AUR for debian-based distros?

I've been using a lot of Debian based distributions recently after half a year on Arch. The main thing I miss a lot is the AUR. The convenience of having all my packaged in one format is a huge reason why I use Arch. Is there anything like it for the AUR?

I also think that things like Flatpaks and Snaps could be useful, as I don't really want to have tons of repositories for tons of programs I install.