These flags hint the backup state of the credential, which is beneficial for knowing when to offer password removal for a user or similar.
<rdar://problem/93191958>
https://github.com/w3c/webauthn/pull/1695
Created attachment 459244 [details] Patch
Comment on attachment 459244 [details] Patch LGTM. r+
Committed r294122 (250501@main): <https://commits.webkit.org/250501@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 459244 [details].