NightSky Nope I didn't change any settings. And here is a Tweet from the project confirming that the dock should work. https://nitter.net/GrapheneOS/status/1671754760364478467
Not sure what to do to troubleshoot that issue, sorry. Maybe make sure you're connected to the internet when you connect the tablet to the dock, so it can download the latest firmware update. Or maybe try reflashing the phone? No idea if either of those things would work.