Using a display port with Xbox.

Probably not since display port does not support audio like hdmi. Plus the display port speeds might not support the 4k hi res requirement. Based on what I've seen no current console in development have a display port

Sebbene xbox sconsigli di farlo, l'unico modo per farlo funzionare correttamente con "display port" è utilizzare un adattatore "attivo" "HDMI" a "Display Port".
In questo modo la console può comunicare con il monitor e ottenere informazioni sulla risoluzione e altre cose di cui ha bisogno.
Dovr supportare HDMI 2.0 e Display Port 1.2 per un massimo di 4k a 60hz e Display Port 1.4 per 4k a 60hz o 10 bit a colori.

Although xbox does not recommend doing this, the only way to have this work correctly with "display port" is to use an "active" "HDMI" to "Display Port" adapter. This way the console can communicate with the monitor and get resolution information and other
things it needs. It will need to support HDMI 2.0 and Display Port 1.2 for a maximum of 4k at 60hz and Display Port 1.4 for 4k at 60hz or 10 bit color.

No you can go on YouTube and see other people use hdmi to DisplayPort active adapters for their Xbox series X but it has to be a active adapter with a usb plug on it to power it you can’t just use a hdmi to display port cord you won’t get picture or audio. And you’re right it’s not bidirectional it has to be hdmi to display port active adapter not display port to hdmi active adapter. And the display port hooking up to the monitor also gives it a way cleaner and more colorful and crisp picture compared to just regular hdmi to hdmi

I use a hdmi to display port active adapter so it does work it’s not a hdmi display port just cable so it works

Will other devices display on the laptop using the port? If they do then it's a setting on the console; if not it may be a the port/laptop.