Voice assistant not working on venu 3

I bought a venu 3 today and I cannot get the voice assistant working. It says "connecting" and eventually "no connection ". I read a couple of threads with the same problem but no one has a solution. I tried repairing and resetting the watch but it makes no difference. My phone is a OnePlus Nord 2T. Does anyone have a working solution?

Edit: in the Bluetooth menu the watch is called "watch" not venu 3. I only saw the name venu 3 once in my attempts to fix the voice assistant problem