On grapheneOS, if I disable network access to apps like gboard, google photos or file manager, can the play services and services framework access their data and send them to google since we have to give them network access.
No not possible in Graphene as Play services aren’t privileged.
No, they run in a sandbox and don’t have full system access, as they do on traditional Android phones.
Will they still work if you disable network and sensor access?