If it is indeed broken, vet care is best, but sometimes that's just not an option.
You would want to examine closely to make sure no bones are poking out of the skin. The wing bones are fine and small, so take your time looking her over, looking for any broken skin. You may see a bit of a greenish color, this is bruising, take note of those areas.
While you are looking her over, see if there's any other injuries that may have been missed and hidden under the feathers.
Here's a splinting guide that you may find helpful.
https://theiwrc.org/wp-content/uploads/2011/05/Duerr_Splinting_Manual_2010.pdf