Until this is fixed, no thank you.
Give me a secure way to make backups on my own infrastructure without the need to forgo my data sovereignty and disaster recovery dependencies to the likes of Google, Apple, etc.
It's good that you can't export a Passkey, which reduce the attack vector against phishing and extraction. It's kinda like how an SSH or a GPG private key should never leave the computer it was generated from, and each machine should have their own unique private key.
I’m not saying that’s the only (or even main) reason Google and Apple don’t let users make their backups, but explicit non-exportability can be considered a feature in some contexts.