The Fitbit Versa 2 is compatible at around £200 but I think the Versa 3 is the same price so could get that also?
There is a watch face called Glance where you enter your XDrip details and it should automatically relay information from MM to phone then to watch.
Haven’t tried doing it myself though, I have the watch but couldn’t deal with Libre inaccuracies and at that price point if I have to calibrate a few times a day then what’s the point? Waste of £100/month