In macOS Catalina, iTunes has been replaced by separate apps, but none of those new apps takes on the tasks of syncing your music, books, photos and other data to your iPhone, iPod touch or iPad. That responsibility now falls upon the Finder.
So, does this means you can plug in your iPad and drag and drop all your apps’ files between it and your Mac? Of course not. In fact, apart from this functionality now being in the Finder, not much has changed at all.