No problems here.
Is your watch connecting, but not syncing? Or not connecting at all?
Is the circle next to the device on the app green or grey?
If it's connecting but not syncing, have you tried manually syncing?
If so, does it say it was successful or do you get some kind of error?
Have you tried power cycling the watch and/or power cycling the phone?
Well it says that the watch is connected to my iPad and the circle is green but when I select sync I receive a syncing failure notice. I have checked and rechecked everything to the best of my knowledge but to no success.
Interesting. I don't think I can help. Hopefully that bit of info will help someone else give some advice though.
If it was me, I'd try remove the device and go through the pairing process again.
Similar issue on Android and via Wi-Fi with my Fenix 5x. Everything says it syncs fine, and certain things do (hear rate, steps, move IQ events,) but activities such as "Running" do not.
Activities record fine on the watch and stay there. I can also get notifications from my phone on the watch, so I know that the connection is fine.
Activities will not sync via Wi-Fi when connected manually (even though it says "transferring.... Complete".)
They will, however, sync if I connect the watch via USB to my computer and use Garmin Express to pull the activities off.
It's super weird. And annoying.