Starting with macOS Catalina, the Finder replaces iTunes as one of the ways to sync your device with your Mac.
The Finder is a macOS feature for browsing and accessing content on your computer. If you update to macOS Catalina or later, you can use the Finder to sync content between your Mac and your iPhone, iPad, or iPod touch. The experience is similar to using iTunes.
Instead of the Finder, you can also use iCloud and Apple Music or similar services to keep content from your Mac or PC in the cloud. That way, you can you can access your music, photos, and more on your devices when you aren't near your Mac. If you do that, some of the Finder syncing features described below might turn off.
If you use iCloud or other services like Apple Music to keep your content up to date across all of your devices, some syncing features through the Finder might be turned off.

* You can only sync your device with one Apple Music or Apple TV library at a time. If you see a message that your device is synced with another Apple Music or Apple TV library, your device was previously connected to another computer. If you click "Erase and Sync" in that message, all content of the selected type on your device will be erased and replaced with content from this computer.
After you set up syncing with the Finder using USB, you can set up the Finder to sync to your device with Wi-Fi instead of USB.
When the computer and the device are on the same Wi-Fi network, the device appears in the Finder. The device syncs automatically whenever it's plugged in to power.