The ability to move comments between different entity types is a feature which doesn't affect the architecture of your module (as far as I can tell, I do not know Drupal 9/10 so I just guess). Therefore no need to think about it right now. Implement the core functionality and then add such a nice feature later.
Nikita Petrov → made their first commit to this issue’s fork.
Ok, in this case I cannot transfer ownership (I do not have such an option on module's page), and as far as I know the previous maintainers are no longer available - @dragonwize @webchick
I suggest you to use the
https://www.drupal.org/project/projectownership →
queue.
I would be happy to pass the maintainer privileges for this module to @lostcarpark, but I do not know how to do it, can anybody give me a link to a related drupal.org documentation, please?