You can (and should) do the same with passkeys. Like SSH keys, they're just text.
Save a passkey in Bitwarden, then export your vault as JSON. You'll see a nice plain text JSON block with your passkey that you can print, or backup, or import into whatever replaces Bitwarden.
Save a passkey in Bitwarden, then export your vault as JSON. You'll see a nice plain text JSON block with your passkey that you can print, or backup, or import into whatever replaces Bitwarden.