Can I still install iTunes in macOS Catalina?
I was just wondering if I can still use iTunes instead of Apple Music on macOS Catalina
No. iTunes is dead on Catalina. Can it be forced to run on Catalina? Maybe but it would require nerd magic potions and geek incantations and would probably break with the next version of Catalina. So unless you want to get into fiddling with the system itself the answer is still no.