All TV remotes should be your phone.
Discussion
No! I don't want to look where the fuck I need to touch the screen. I want to feel a button below my finger and be sure I can smash it ten times to increase the volume by exactly 10.
Ok boomer.
I have my phone set up so that when I'm listening to music, short pressing volume changes the volume, and long pressing changes the song. Maybe it can be same but with channel instead of tracks.
I have something similar with Kodi and Kore remote app, it's convenient for searching a media and yes for volume and next song, but for browsing movies on screen and navigating options using arrows, it's a pain, I always end up click on another button or just in a blank space, and have to look at my phone and back at the screen.
Also if you have kids, you definitely don't want them to use your phone to choose their cartoons.