@NeeeeB I haven’t found such information yet.
/remoteapp/mobile/broadcast/ui_service/state gives you something like this:
{
"statetype": "livetv",
"list_param": "sl5824ec82-db05-4acf-85d1-404b560ac198",
"channel_num": "1",
"eventid": "",
"progname": "FIS Skispringen Weltcup Bischofshofen HS 142",
"starttime": 1641740100,
"endtime": 1641747600,
"detail": "live aus Bischofshofen\n\nKommentar: Michael Roscher\nCo-Kommentar: Andreas Goldberger und Martin Koch\nModeration: Boris Kastner-Jirka",
"channel_param": "8#ch1e71308f-8015-4217-bee3-92f9bbe4746e#sl5824ec82-db05-4acf-85d1-404b560ac198#4",
"channel_name": "ORF1 HD",
"sourceid": "TV",
}
But I don’t know any HDR channel nor do I have any HDR content to try with.