Given that the most common transition here is I have 1 device -> I have 0 devices because I lost my phone I think what you mean is "Google can do this for use

Given that the most common transition here is I have 1 device -> I have 0 devices because I lost my phone I think what you mean is "Google can do this for users with more than one device". Which they do. E2EE has meaning, and being convenient to recover isn't in it.