Is there a way to use a Pixel 7 in a privacy friendly way until GrapheneOS is released?

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One thing you need to keep in mind is that on Stock OS, Google has privileged access to the device, compared to what it would have on say GrapheneOS with Sandboxed Google Play.

You can’t really avoid Google on stock, because they essentially have a bird’s eye view. The question is how much of a problem that is for you, and exactly what you’re afraid that they will collect.