If you’re comfortable using the terminal, you can get them by using the Bitwarden CLI like so:
bw list items | jq '.[] | select(.login.fido2Credentials | length > 0) | { id: .id, name: .name }'
(Assuming you have the jq tool installed to parse the JSON.)
This particular invocation extracts the internal ID and the name of the item, but you can remove that last bit to get the whole data of each item:
bw list items | jq '.[] | select(.login.fido2Credentials | length > 0)