So I stumbled upon the app TVIrl and it will make an Android TV add your IPTV channels to the usual TV-app (preinstalled) on your TV. I got it to work on my Sony Android TV - even though its not super clear how it ended up in the right place. The guides are all talking about the "Live Channels"-app but after that one is setup it magically appeared to my usual TV-guide and app. Automatic update of EPG is not in place yet and it looks like it will cost when that feature arrives - but for me its working perfectly at the moment just need to manually refresh EPG every now and then. Make sure to filter which channels you see in your dashboard here - took a loong time with many channel and it also crashed when I had like 6000 channels (my filter was reset for some reason).