Welcome to the Wyze Forum @andykeck.
Yes, you can replace the camera on the Wyze Flood light.
There is a screw under the camera on the base, unscrew that and remove the camera. Then pull the pigtail out of the floodlight (it takes a little force). Once removed you can add a new V3 to it and setup teh camera new with accessory. (Only the V3 works with the Wyze Flood light, as the Floodlight is an accessory to the V3 camera).
I took pictures in this thread for something unrelated, but you will get an idea of how the camera comes off with this pics.