DeletedUser265 I don't know why you would need this app and I don't know what you mean by “google sandbox”.
Applications are already sandboxed in the standard sandbox without special access and GrapheneOS improve it, use permission toggles in settings > security and privacy > privacy control > permission manager.
Private space is a feature included in Android 15 that replaces the work profile, you can also install applications in separate system-wide profiles if you don't want applications in the same profile to be able to communicate with each other via IPC (inter-process communication).
Applications of the same profile are always adequately sandboxed.