If you’ve been using passkeys, you’ll need to generate new ones when you switch. AFAIK, they aren’t exportable from Google or Apple. Which, among other reasons, is why I’ll just stick to high-entropy passwords. I’ve had some sites like Amazon try to sneakily make me register passcodes, I’ve had to go back and tear them out before they screw me somehow.
It’s an interesting filesystem, but you shouldn’t use it at this point unless you know what the hell you’re doing. You’ll need to be able to notice, report and help resolve bugs, and under no circumstances use it for production or where you can’t afford to lose some or all of the data on the partition.