Currently the Philips TV integration uses the jointspace API which is only avaliable for a selection of Philips TVs running Android.
There is a second product branch running a more streamlined OS called SAPHI OS. These devices do not have Jointspace. However, if you search for pylips on github, you’ll find a python library which uses a reverse engineered API for both product branches. This could help enable a more wider target range for connecting philips tvs to HA. I’d love to have this to check the TVs status and dim my Hue lights accordingly.