What happened to iTunes? –

With macOS Catalina, your iTunes media library is now available in the Apple Music app, Apple TV app, Apple Books app, and Apple Podcasts app. And Finder is where you can manage and sync content on your iPhone, iPad, and iPod touch.

..macOS 10.14
macOS 10.15
Audio – Books iTunes app Books app
Audio – Music iTunes app Music app
Audio – Podcasts iTunes app Podcasts app
Audio – Radio iTunes app Music app
Text – Books iTunes app Books app
Video – TV iTunes app TV app
Sync iPhone, iPad… iTunes app Finder
Image – Photos Photos app Photos app