Sleep timer should be added as a new update to the roku stick. Even if some tvs are not able to have it function it doesn't hurt to try considering that I have a 4k express and it doesn't even give me the option to put a sleep timer on it when my normal tv controller is broken. If the roku stick controller can turn my tv on and off and the volume up and down as well. Why can't it also have the sleep timer option?
Please consider adding a sleep timer to the roku stick as a new update. It seems that it has been greatly requested by many people for years and it still has not been added. It doesn't hurt to try.