https://www.download.p4c.philips.com/files/5/55pus7906_12/55pus7906_12_pss_deude.pdf

The technical data sheet states: Wi-Fi 802.11n. This means that it can be connected via WLAN.

Yes, the Philips TV has Android TV and the Yallo TV app is an Android app.

Hello, yes that is possible. The only requirement is a free HDMI port.

No unfortunately it does not work directly with this model, but it would be possible with this model as it supports Hue functions : Philips 55PUS7805 : Philips 55PUS7805 Ambilight (4K, LCD, 2020, 55 ") Or you can buy a HUE Synchro Box with the 55PUS7906, which allows you to integrate any TV into the Hue system: Philips Hue Play HDMI Sync Box