Can you add the UNIX&Linux SE to the available migration groups? It has a lot of other groups but in some cases allowing a transfer to that group might be preferable.
Unix and Linux related questions are all on topic for Super User. They're fine to stay here. (So long as they fit the other requirements of being on topic/in scope, not being a smartphone, smartfridge, etc.)
The only time a question is migrated from here to the Unix & Linux Stack Exchange site is if the user asking the question requested so because they thought the audience might be better for them.
Other than that, moderators will decline migration requests.