While the community cannot migrate directly from SU to Tex, because it isn't one of our normal migration paths, a ♦ can migrate a question to anywhere.
So, if you feel that a question is off-topic on SU and belongs on another site that isn't a normal migration path, then please flag this question as
it needs ♦ moderator attention →
other and specify which site it belongs on and importantly why it needs moving.
If the ♦ that processes the flag agrees with you, the question can then be migrated to the target site.
As an aside, please never migrate a question to a intermediate site - it is never right to send a question to SO (or anywhere else) with the sole intention of re-migrating it from there to a third location.