> I store mine in my vaultwarden.
Can you export it from there? My main gripe with passkeys in 1Password is that seemingly you can't export them, unless you export it to "someone else", which isn't clear if that someone can be just "you".
Yes. I've done many imports/exports and have lost no passkeys with Vaultwarden.
I do not know the answer to your question but mine are in Vaultwarden. This probably means I have access to them. The method to get them out might end up not being pretty but it should be possible.
If your password vault supports https://fidoalliance.org/specifications-credential-exchange-... you can. (Bitwarden does)