"gcompris" (educational software) now has Calcudoku
This software has been around a _long_ time, and a new version has just been released:
https://linuxfr.org/news/version-4-0-pour-gcomprisIt has Calcudoku (!)
Possibly Linux only, and maybe only in French for now (?), I still have to check it out.
edit 3: runs on Linux, Mac, Windows, Android ...
edit:.. English version of the software:
https://gcompris.net/index-en.html(the first link is a news article)
edit 2:it all looks very nice, puzzles go up to 5x5 it looks like:
(image scaled down by a factor of 16)