Setting up / Troubleshooting Continuity-Camera
No, you want bluetooth and WiFi for best discovery and cross device functionality and response from continuity and handoff features. Ideally there is no interference as well once your radios are working again. External Bluetooth works great for continuity when I have a machine that’s difficult or costly to repair.
Just be sure you buy a device that you can get good support if they don’t use Apple drivers effectively or return the product if it fails to work.

Continuity and Handoff Bluetooth Setup