alt Hacker News> Curve Pay refused to give me an account on my Murena FP6
That's probably because /e/OS uses microG, which is vastly inferior to Sandboxed Google Play on GrapheneOS, and has much worse app compatibility. You should also know that /e/OS is a highly insecure OS, and both Fairphone and Murena are constantly misleading their customers with false marketing and false promises.
MicroG has two huge advantages: you can inspect the code it's running, and you're not tied to Google services. For example you can replace the location service with a privacy respecting one. With the sandboxed play you can't do that, you're stuck with the Google version. The only thing you still need Google for is the push notifications, because the backend of the apps only speaks to them.
It would be amazing if grapheneos would support microG as an option. But they are too much "not invented here" for that to happen.