Permissions and apps needed to get the Pixel Watch working?

Sunny

So I got the Pixel Watch (LTE) for free with my P7P (running GOS) when Google was doing that offer, and I've recently wanted to start using the watch as it seems to have stabilized a lot since release.
Only problem is that it doesn't seem to want to setup properly.
I've got the Google Pixel Watch app installed along with GSF and GPS, and even if I grant them all permissions (including networking and sensors), the Watch will stay on this screen for about 5 minutes: https://i.imgur.com/j0EpcFI.png
After those 5 minutes, I get left on "Can't pair devices" with the only option available to me on the Watch is to "Reconnect".
If I reconnect, it will restart and ask me to pair it with my phone. When I go to my Bluetooth devices on my phone and connect to the Watch, it displays 6 digits on both my phone and Watch to confirm that they are the same.
After which, I'm stuck in this loop once again: https://i.imgur.com/j0EpcFI.png

I've tried completely resetting the Watch and giving all permissions to Google Pixel Watch, Google Services Framework, and Google Play Services with no luck.
If anyone knows how to solve this issue (and possibly what the bare minimum permissions I need for these apps/services are to function) it would be great.

anoa

I too was having the same issue. Using adb logcat, I saw the following lines repeating during the failing setup step:

WearSetup: [WatchConnectionStep] Force enabling connection for ConnectionConfiguration[ Name=Google Pixel Watch 0XXX, Address=XX:XX:XX:XX:XX:XX:XX, Type=5, Role=1, Enabled=true, IsConnected=false, PeerNodeId=null, BtlePriority=true, NodeId=null, PackageName=null, ConnectionRetryStrategy=0, allowedConfigPackages=null, Migrating=false]
WearSetup: [WatchConnectionStep] Connected configuration not found, retrying in 3000

which repeated for a few times until the setup timed out and I was told to factory reset the watch.

I fixed it by allowing the 'Nearby Devices' permission to the Google Play Services app in Settings.

Settings > Privacy > Permissions Manager > Nearby devices > Google Play Services > Allowed.