Python 2 Dropping Database
Welcome to the future! This package does not support Python 2 at all. All is good in the world.
From the RPM names, it looks like this package was last built for Fedora 30, and it FTBFS (fails to build from source) since then.
in the Fedora Pagure, or go directly to the corresponding
#1715598 mailman3 fails to build in Fedora 31 (rawhide)
python(abi) = 3.7
python3 = 3.8.0-1.fc32