The following packages in main/community require python2 as a run-time dependency:

kodi

The following packages in main/community require python2 as a compile-time dependency:

chromium
firefox
firefox-esr
mozjs68
qt5-qtwebengine
rethinkdb
mozjs60

The following packages in testing require python2 as a compile-time dependency:

thunderbird

Maybe it is possible to adjust the necessary packages and move python2 from main to community before 3.13 is released. Moving it from community to testing or removing it entirely is probably not feasible at this point. Supporting python2 for the next 2 years seems very unrealistic to me.