There was recently a Q&A at the 1password subreddit where the developers said that the ability to export passkeys is being worked on right now, but at the moment it’s not possible (for passkeys in general, not just in 1password).
What I find interesting (and disappointing) is that they said that passkeys will never be exported unencrypted because that goes against FIDO’s security requirements. This means that you will always depend on an app to have access to your passkeys. What I found really strange is that they claimed on more than one occasion that being able to export passkeys unencrypted will make them “no better than passwords”. That doesn’t make sense to me.
Here are all the related replies I was able to find:
https://www.reddit.com/r/1Password/comments/16to6x7/comment/k3g1ugc/
https://www.reddit.com/r/1Password/comments/16to6x7/comment/k3g1kz5/
https://www.reddit.com/r/1Password/comments/16to6x7/comment/k3g7b1m/
https://www.reddit.com/r/1Password/comments/16to6x7/comment/k3g53p5/
https://www.reddit.com/r/1Password/comments/16to6x7/comment/k3gacy4/
https://www.reddit.com/r/1Password/comments/16to6x7/comment/k3ghom6/