I had an Android (Samsung Galaxy) smartphone with AT&T providing the carrier service. Because AT&T owns DIRECTV, they allow unlimited streaming on their DIRECTV app using AT&T's cellular network data that does not affect your normal internet or hotspot data limits like it would for, say, Netflix.
That allowed me to stream DIRECTV with no data limits or surcharges to my phone over the cellular network while traveling in my RV. I would then use the "Smart View" (Miracast) feature on the phone with my Amazon Firestick/TV to connect the two devices over a direct-WiFi connection (the Firestick has a wireless transmitter/receiver built in to facilitate this connection).
The direct-WiFi connection ability that "Smart View" used was important because the connection used this feature instead of demanding a WiFi connection to the internet over AT&T's network, eating up my data limit, negating the advantage of the unlimited streaming if I was required to access the internet using AT&T's cellular network or hotspot capability.
I recently upgraded to a new Galaxy A14 5G phone running Android 13 to get the benefits of 5G. Samsung/Galaxy, in their infinite wisdom, deleted the "Smart View" functionality, "replacing" it with "SmartThings", which not only requires a WiFi connection to the internet or a special SmartThings hub/router to function, and in addition, it does not support Amazon Firestick or many other devices "Smart View" used to support.
Any help or constructive guidance on how to get "Smart View" or a similar app that only required a direct-WiFi to implement the screen mirroring capability would be appreciated. I have been hunting for such an app for weeks now.