processCreate returning null for certificate fields

[SeanHerbert]

$data = $WebAuthn->processCreate($clientDataJSON, $attestationObject, $challenge, $userVerification === 'required');

results in:
$data->certificateChain equals NULL
$data->certificate equal NULL
$data->certificateIssuer equals ""
$data->certificateSubject equals ""
$data->signatureCounter equals NULL

I'm testing with windows hello.
Any help would be much appreciated.

EDIT: I looked at \Format\None and it returns null for getCertificatePem, Which makes sense. But when using \Format\Packed, I can't figure out why my attestStmt->x5c is coming through as null.

[lbuchs]

it's a bit of a surprise what you'll get from windows hello. If you get "none", there is no certificate.
if you get "packed", it's normally self-signed, so there is no x5c certificate. If you get tpm, it's signed. I could receive tpm only on a newer device with the edge browser, with chrome and firefox I always got "none" 🤔. Microsoft dev guide: TPM attestation is a best effort. Only PCs with TPM 2.0 will return a TPM attestation statement, and the attestation process could fail for a variety of reasons.