There is: Linux Mint Debian Edition. There are a few things you’re missing in LMDE than in the standard Ubuntu-based version though, such as the driver manager and support for PPAs. The latter of which has declined in usefulness with the rise of Flatpaks, I haven’t installed from a PPA in years now.
Isn’t there a Debian version of Mint too?
There is: Linux Mint Debian Edition. There are a few things you’re missing in LMDE than in the standard Ubuntu-based version though, such as the driver manager and support for PPAs. The latter of which has declined in usefulness with the rise of Flatpaks, I haven’t installed from a PPA in years now.