Can someone explain the difference between a mortgage banker and correspondent mortgage lender?

Does anyone do manufactured new construction home loans where they finance the acquisition of the land and the purchase price of the modular or manufacturer home from the manufacturer. Is is FHA, VA, USDA, or conventional loans? Or is it non-QM manufactured home loans? Alot of these manufacturer homes are better than stick built homes.

38 Special

https://youtu.be/vJtf7R_oVaw?si=N6EFuU8cPBJoWP7Z