You can down load the link app to mimic your screen to your phone or tablet with Lowrance or Simrad. I’m not sure if you can then mimic your tablet to a smart tv through Bluetooth.
If your tv has the ability to download apps you might be able to download the link app and mimic directly to your tv.
You can hard wire through the Ethernet port from your unit to a screen, obviously it would be sight only, you would be able to operate through the screen.