Mission accomplished. The previously published ceiling of the F-22 was 50K feet. The Pentagon said it (edit: by "it" I mean the F-22) was flying at 58K feet when it shot down the first balloon. Guess it can do (at least) 58K.
This was probably not entirely groundbreaking news to anybody including China. Everybody knows that the published specs of military hardware are intentionally distorted in one direction or another.
The F-15's known ceiling is 65K feet for example. So it's not surprising that newer fighters can match that.