Transparency signing log for all signatures issued

[Dimitri John Ledkov (xnox)]

Is there a requirement, or ability to provide Transparency signing log? Specifically when signatures were issued, what was the raw sha256 and authenticode sha256 of the object signed, as well as some obfuscated indicator of what was signed and/or potentially public identifier (guid) of the vendor for whom signature was issued?

Could this be extended to signatures produced by certificates vendored into 3rd-party shims too?

Possibly using something like https://docs.sigstore.dev/logging/overview/ ?

Note one can use rekor transparency log without using fulcio based signatures.