28
Foss TV Remote Control App
(lemmy.ml)
F-Droid is an installable catalogue of FOSS (Free and Open Source Software) applications for the Android platform. The client makes it easy to browse, install, and keep track of updates on your device.
Matrix space | forum | IRC
Unless the TV is Foss you may be out of luck. You might be able to control it with a web interface if it has one