My TV remote has buttons for I think two services, but since I got a Firestick, I only use it to switch the HDMI input, usually to play games, so those buttons are not used at all. The Firestick remote has 4 buttons, Prime, Netflix, Peacock and Direct TV, which I have mostly ignored, but the Peacock button got some use lately because of the World Cup, since they were showing the Telemundo feed and the easiest way was to push the button and it would turn on the tv and launch Peacock directly.
The tv remote has a function that you can program the number buttons so that you could hold down, for example, the number 1 and after a few seconds it would launch a given app, and before I had the firestick I used that function to launch some of the apps installed on the tv.
Now on the Firestick remote they have a “recently used apps” button I use frequently instead of using the menu with the ads and what not. It is possible to reprogram those preset buttons on at least the Firestick remote to launch a separate app, and I managed to do it once a while back, but it was not straightforward.
//i\\