She's beautiful. While I think AppyXQH is likely it is also possible she is full Appy since some are like that (can have a lot of QH blood and still be considered an Appaloosa). I mean in theory she could be some obscure cross (as could any of these guesses) but I agree with the others.
Again, pretty pretty girl. Love her look. Interested how her stifles kept some color too while other spots are more washed out, her hips for example are completely white, looks like traditional varnish with one or two funky spots lol.