Question about Philips 55OLED806 Ambilight

All HDMI connections on the TV support ARC or eARC.
The problem will probably be that the TV does not have a dedicated HDMI OUT connection. And only one HDMI connection can output the ARC signal at a time. The TV also has an optical audio OUT (which is deactivated when streaming Dolby Digital Plus). I don't understand why, but it says so in the manual. Presumably the same applies to ARC. See p. 48 if you want to read about it).
Here is the homepage with specs and manual:
https://www.philips.com.sg/c-p...

HDMI2 is equipped with eARC, the other HDMIs have normal ARC. The eARC function can also be deactivated if only ARC is required. Audio output via HDMI ARC is possible without any problems. Depending on where the source is coming from, you can loop the signal from the TV or another HDMI source and convert it to Dolby Digital Plus or stereo. If you have an older receiver that does not have ARC HDMI, you can use the stereo headphone jack (3.5 mm) output to transfer the sound to the amplifier. I have a Sonos ARC in operation and can control it without problems via HDMI ARC or HDMI2 eARC from the OLED806.