Okay, just poat here anything nice from Czerny. Maybe a recording as well if there’s one.
I’ll start off:
The most obvious choice, his 9th Sonata in b minor.
The infamous Toccata in thirds (probably inspired by the Clementi toccata and likely gave rise to the Schumann one):
Libetta practising his octave etude op. 740 - I’ve sight-read it and it doesn’t seem too terrible! Would make for a great show-off piece.
For the faster, performance version of it check out the Youtube video of his performance od the 740 etudes uploaded by (Czernyer?) La musical.