Block and move on.
If you’re ever unsure about a call, ask the caller for their name, hang up, and call them back using a published number that you yourself looked up. Not any contact number results from AI results, and certainly not whatever number they told you to call. A contact number that you yourself looked up. Only.
In the case of a payment card, the number to call is usually (always?) on the back of the payment card.
In the case of Synchrony, their website: https://www.synchrony.com/help/contact-us
That FDIC ID is likely an image generated by AI. And the FDIC calling some individual? Via FaceTime? From a Gmail account and not FDIC? That seems… unlikely. If you’re at all unsure, call them back, using a number you looked up. And if its official, only with your lawyer.
If any official FDIC call ever happens — you’re not the local pizza place next to the FDIC offices taking orders for take-outs and deliveries — you will likely want to talk with them only with your lawyer present.