Did you experience otherwise? What's it doing without connection to a relay?
Discussion
It communicates with other Android apps via intents, it doesn't need a relay unless you use it as a remote signer
Can't test this right now as I'm not using my new Pixel with #GrapheneOS yet (the described problem I experience on another phone, really thought it's Amber not liking my airplane mode usage), but great if it really works that way.