How can I make a Roku Streaming Stick 4K remote turn dumb TV on?

I have a Roku Streaming Stick 4K and its remote has an TV ON/OFF button.
The Roku is connected to a dumb TV, which I can turn on or off with Roku’s remote.

Is there a way to send a command that will turn the TV on or off through HA?
The TV does not have any LAN capabilities, no ethernet, no WiFi.

Is that even possible? I found these instructions but I think they are for a TV that has Roku preinstalled.