SellerLens

ShareScreen

Show your Mac screen on your TV. Both devices must be on the same Wi-Fi.

TV / Fire Stick: open sharescreen.sellerlens.in in the TV browser (Silk on Fire Stick), tap "This device is the TV". A code appears.
Mac: open the same page in Chrome, Edge or Safari, tap "Share my Mac screen", type the code, pick your screen.
The video goes directly from Mac to TV over your Wi-Fi. It never passes through a server.