[mmooss]

> NetGuard allows you to block connections to Google servers except for Google Apps, which network firewalls and DNS solutions can't.

How do you know those connections are blocked and not merely bypassing Netguard?

[okso]

I am using GrapheneOS. GrapheneOS has a compatibility layer providing the option to install and use the official releases of Google Play in the standard app sandbox.

See https://grapheneos.org/features#sandboxed-google-play

NetGuard also shows network requests from GrapheneOS itself, all proxied by the GrapheneOS project, as described here: https://grapheneos.org/faq#default-connections

[mmooss]

I could see how they are blocked on your system, using GrapheneOS, but that doesn't tell us if Netguard blocks them on Android systems. One reason for GrapheneOS is to close that kind of hole.