EXCUSE ME WTF THAT AWESOME
"unprivileged Google Play Services"
Basically being able to run gapps bounded app, but with the fully open and secure OS
It's out on GrapheneOS 👀💦 !!https://grapheneos.org/usage#sandboxed-play-services
It's pronounced ʁaʁyʁe.
And written RaRuRe, or R3 for short.
You can find more infos on this place by clicking there.