A new feature or channel should be added with Sleep Timer functionality. It should be like the "TV Off" channel that was added in a 2020 update that works with the TV CEC function to allow the Roku to send a "power off" signal to the TV at a specified time or specified number of minutes/hours.
Note: Please, don't suggest using a inline power timer. This is dumb, as I go to bed at different times and have no desire to dig behind the dresser every night, nor do I want to go and setup a timer on some Smart power strip. Also, I'd rather leave the TV with power, instead of basically pulling the plug out of the wall.
Okay here is my situation, in settings, sleep timer is turned off. However, when I go to a live TV channel there is a sleep timer set for 30 minutes and the screen is black. I can not figure out how to cancel this timer. Repeated attempts in the settings to turn off sleep timer has not worked. Thanks for your help.