Source: https://bsky.app/profile/funnysnarkyjoke.bsky.social/post/3lmkfwebeuc27
In fact you can use your smartphone to change the channel on nearly any TV. In the comments on that post some people talk about how to do it. Basically you need a smartphone with either builtin IR or use a USB-C IR blaster or if your phone has a 3.5mm headphone jack you can also try one of those but I’m not sure if the 3.5mm ones are as commonly supported.
My Jelly Star (tiny cellphone) had an ir blaster. I had a lot of fun with it until the screen on it stopped working. It still is a decent phone, and I would consider getting another except the warranty process was kinda crap.