Does anyone know about Weingaard ??? Is it a boost for internet 🛜 or is it streaming /tv?? I’m conf

You need to clarify what you are looking for. Weingrad is a manufacturer of rv antennas. It will receive tv signals from publicly transmitted over the airwave tv signals.
FaceTime is an over the internet app. So you need an internet connection. Typically for reliable, dependable internet service in an RV you will need a satellite dish on your RV and a subscription to a satellite internet provider. Not something weingard does. With a satellite subscription you may also be able to receive internet TV, depending.