All Modern Cyrillic Letters (Unicode-Compatible)
Published 2024-07-18
https://www.omniglot.com/writing/interslavic.htm
NOTE #2 - Pe with middle hook (Ҧ ҧ) is technically archaic, but maybe it can be used as an alternative for pe with descender (Ԥ ԥ) probably due to font support.
NOTE #3 - You might notice that some Cyrillic letters from Wikipedia aren't there, either because they're archaic, not Unicode-compatible, or because I don't have proof that they exist and/or were actually used.