I once mended a quilt with loose filling by carefully inserting a strip of mending tape inside the hole with the adhesive facing the back of the quilt fabric. It takes some careful maneuvering, but it came out well after I used the iron on it per the instructions on the tape. Be sure that the edges of the rip meet over the tape. Mine ended up almost unnoticeable. HTH.

Thread and needle using a ladderstitch.

Apply an iron-on applique.