I got a Xfinity remote but when I get it on all it will control is mute ,power.. how do I get it to work right for a TCL TV Roku.... Than you in advance for any help.....
That is normal for cable box remotes. They are not true universal remotes and will only offer very basic support for a TV (power, volume, mute, sometimes input selection). You are supposed to use the cable box for all "TV" stuff.
You might have to disable channel lock, and try other codes like 12049, or 14398.
I don't think the newer voice remotes support those override codes anymore. That was mainly back in the giant silver or gray remotes.