The serratus is the muscle that pulls your shoulder blade against your ribs. Like protracted flat against your ribs.
If your scapula is “winged,” its flying away. Your “normal” position is wrong. Pulling it into correct position will feel different or strange.
If you can figure out how to use your trap (shrug) while in proper position (scap protracted, or flat against ribs) it should help.
Check this out.