iOS 13 WiFi Sync location Previously (before iOS 13) I was able to attempt to begin a WiFi sync from my phone by going to Settings > General > Wifi Sync

I no longer see that option. On my computer (currently on macOS 10.15) I'm at the mercy of the phone showing up in the Finder (just as I used to be at the mercy of it showing up in iTunes) whenever that strikes the phone or the computer's fancy (I'm unable to determine what makes it appear or not.)

Is there a way to tell the phone to begin a sync? (or alternatively tell Finder to look and show me the phone which is connected to the same WiFi network and ready to go if it would just show up ok Finder)
After iOS 13 and Mac OS Catalina, it seems that Apple needs to introduce a helper utility to pair the device.

I’m an iOS developer and we use Xcode’s built in utility to pair and unpair devices.

Sometimes the device doesn’t get automatically connected so we have to connect it via a fixed IP address. 

Open Xcode (can be downloaded free)
Open devices and simulators
Connect via IP


More details can be found here.