thonny package started it's life in Debian and was automatically imported to Ubuntu. It was last present in Groovy, but went missing in Hirsute. Then, the reason probably was that thonny was omitted from Debian for couple of months (because of an invalid bug report).

Now thonny is back in Debian Testing since the 2021-01-06 (https://tracker.debian.org/pkg/thonny), but it's still missing from Ubuntu (https://packages.ubuntu.com/search?s...eywords=thonny).

Is this expected and how to fix it?

How can I find out the reason for removal?