Issue with ADT compatibility

Late August apparently there was some work done on our street by Xfinity and our WiFi is now WPA3 which is not compatible with our ADT cameras which require WPA2 (what we had prior to the updates). ADT won't do anything about the equipment but says we need to figure it out with Xfinity or switch to a different ISP. Can I go back to WPA2? Don't necessarily want to, but also unable to get out of the ADT contract