Poa9615 google play services in the app store isn’t the latest, even in the alpha version
That is often the situation.
Poa9615 can you please update it?
The GrapheneOS developers update Play from time to time -- but before enabling any particular version they need to test it, and sometimes to update the compatibility layer.
Poa9615 i’d love to connect my watch.
As manugraph indicated, what is necessary to connect a watch depends very much on which watch. It might be productive to do a web search for site:discuss.grapheneos.org and the name of the specific watch.