How can I sync my iPhone without iTunes?

Since macOS Mojave (I think) iTunes is no longer used for syncing the iPhone to the Mac.

The job now gets done in a Finder window.

• Click Finder Preferences > Sidebar and make sure that the box for "CDs, DVDs, and iOS Devices" is check marked.

• Open a new Finder window and connect your iPhone.

• Select the iPhone in the sidebar and configure the sync properties as presented in the Finder window.

Please view this support document –

Use the Finder to sync your iPhone... with your computer – Apple Support:

https://support.apple.com/en-us/HT210611

Many processes work seamlessly with iCloud. Make you turn on iCloud for everything. Photos, Messages, etc.. and they should migrate quickly after that.

Sync it to what?