It is 2022 and Roku lags behind competitors with this. Firestick, chromecast, and many others have input changing buttons on the remotes. Roku has kept the same design for nearly 10 years and they need to change.
Get rid of the sleep timer button and put that into the * (star) button settings. Put an input changing button in it's place. If not on the basic remotes, then redesign the Voice and higher tier remotes with the button.
It is odd that even Roku TV product remotes don't do this. HDMI CEC switching is not a replacement for a dedicated button, which other competitors have.