No. In Jain terminology, Mahāvideha is the middle region of Jambūdvīpa where spiritual liberation is possible, but the standard Jain classification of “sanhanan/sanghayana” is usually given as 4 types, not 6. So saying “all 6 sanghayana are in Mahāvideha” is not the standard Jain description. ( jainfoundation.in)

If you meant a different term by “sanghayana,” I can clarify it in Jain terms.