As GmsCompat (sandboxed Google Play compatibility later) development continues we get more compatibility with certain apps due to adding more workarounds with certain apps not working, like our recent fix with a shim for font loading.
In the late future we could look at how to reduce the need to install any Google Play services implementations for apps, make them just work without any services, sandboxed or otherwise. Google Camera, Android Auto, and some others just work on GrapheneOS.
