Yeh, true. I’ve found that most remote controls have dedicated power On and Off buttons that are not on the remote control but are still accepted in the IR. I’m just hoping.
https://www.avsforum.com/threads/discrete-ir-codes-for-tcl-65r615-tcl-65r617.2989206/
http://www.hifi-remote.com/forums/viewtopic.php?t=101473