Hi Andrea,
I would ofc sponsor this when it is ready to upload.
Wrt to the executable name: have you talked to upstream yet? I'm sure Debian isn't the only distro that has the muon problem, and I'm sure the maintainer would not like to see this program having different names on different distros. Maybe it also makes sense to talk to upstream KDE if they might consider renaming the executable (even though it is dead, I think everyone could tag a minor release with such a change).
I think we should definitely avoid that muon has a non-standard binary name. It is used e.g. as meson build files formatter in certain IDE extensions, and they will not be aware of this.
Regards,
Stephan