Yes it is possible, pocophone can output screen mirroring over usbc using the displaylink app.
You will need to buy a displaylink to hdmi converter like this one to convert usbc to hdmi :
https://www.amazon.co.jp/dp/B013G4CJ..._Ov8UCb04VKKA6
Unfortunately there is a bug on the display link application for android on the pocophone and maybe with all the xiaomi phones, so it does not look smooth.
We are waiting some news from the display link technical team about it.
Hope it will be good news for the very huge community of the pocophone users