The short answer.
The Hisense CanvasTV, the S7 series from 2024, has an Art Mode and a Hi-Matte screen, so art on it looks printed rather than lit. You can put your own pictures on it from a USB stick or from your phone through Hisense's app.
I found no subscription on Hisense's pages for showing your own art.
Way 1, a USB stick
Copy the art onto a stick, plug it into the TV, and add the pieces from the USB device in Art Mode.
Way 2, your phone
Save the pieces to your phone's photos and send them to the TV from Hisense's app.
What size the art should be
The CanvasTV is a 4K screen, 3840 × 2160 pixels, 16:9. Art made at exactly that size matches the screen.
The look
The matte screen does most of the work. Keep the brightness low in the evening.
Art made for it
Every piece I make is 3840 × 2160 PNG, 16:9. Every collection is signed, comes with a certificate and the story behind it, and downloads the moment you pay. The files are yours. Put them on every screen you own.