Xuntian Space Telescope is scheduled for launch next year. Yes it will co-orbit with the station and berth to the station once in a while to be serviced by the crew, then move away to do its own observation.

I'm not sure how the docking works though. It may be that Xuntian has a regular docking port and hard docks to the station like a Shenzhou, or alternatively it may not and just have the little grab spots for the stations robotic arm to grab onto.