And all of your passkeys should still be on each device in such a case. It’s sync, not a singular vault.
I’ve submitted comments to this effect to the FTC, and I’d encourage others to as well. Email (where all roads currently lead) should not be your identity in the 21st century, and losing a device or Big Tech account shouldn’t permanently banish you from digital account access.
Some relevant comments I've written on the topic in this thread: https://news.ycombinator.com/item?id=38691082 | https://news.ycombinator.com/item?id=38691156