I want iTunes but my device is too new

The iTunes app for Mac computers was discontinued and replaced when macOS Catalina was released. It cannot be installed on Macs that are running Catalina or later. See the following Apple article for information about the replacement apps: What happened to iTunes? - Apple Support

Recent macOS versions (later than 10.15 Catalina) adopt the built-in app Finder, instead of iTunes.

Regards

Giulio

iTunes was split into several apps: Music, Podcasts, TV and so on.

Music can import iTunes Libraries.

Syncing is done via the Finder