Pair IR Mini with multiple watches simultaneously?

Has anyone tried pairing the Inreach Mini with more than one watch at a time? Does it work?

I currently have it paired with my Fenix 6X. Just got my son an Instinct recently, and now I'm curious if he can pair his InReach widget with the same Inreach device as I have my Fenix paired with. Ideally, it would be great if, when we're hiking together, incoming messages could be displayed on both watches, and also have both watches be able to send messages.

If nobody knows, then I might just give it a try and see what happens, but I don't want to end up screwing something up if it doesn't work.