Applications don't provide manpages

As per title

$ man mpv
No manual entry for mpv
See 'man 7 undocumented' for help when manual pages are not available.

$ man krita
No manual entry for krita
See 'man 7 undocumented' for help when manual pages are not available.

$ man keepassxc
No manual entry for keepassxc
See 'man 7 undocumented' for help when manual pages are not available.

There is neither a “man” command inside the core snap (which is the environment your snaps run in) nor a manual database …

looking for “manpages” in the forum search will reveal that there is already being worked on though … :

sorry for duplication.