You can utilize the screen mirroring feature to view your phone's content on the large screen of your TV.
Mirroring the screen of Sony Xperia XZ Premium to TV is as follows:
Step 1: Open the notification panel, select the screen mirroring icon.

Step 2: Select start.

Step 3: Wait for the TV name to appear for connection, on Smart, navigate to the screen mirroring section as well.

Thus, the setup is complete. Wishing you success.
Check out more guides on Sony Xperia XZ Premium here