I see a lot of people sharing crazy screen on time with s21 ultra, I'm just narrowly getting 5 hours. Maybe someone has an idea why this could be? : r/ samsung
Displaying your mobile device screen on the TV | Samsung LEVANT
Screen mirroring to your Samsung TV
Samsung Galaxy S21 FE (SM-G990U/SM-G990U2) - Screen Sharing - AT&T
Best and Free Ways on How to Mirror Samsung Galaxy S21 to TV