How to appeal a rejected partner profile in the verification process

@JillArmour, I hijacked a different support request in which I was able to speak to a support assistant. They were able to review the internal email traffic to discover that the verification rejection was because I am a Sole Proprietor and have selected to join the Commercial Marketplace program. And despite all the rejection messages talking about domains and entity names, the actual rejection reason is that Commercial Marketplace *requires* proof of an incorporation certificate - and I'm not a Limited Co so won't ever have that cert. The follow up is to check if it's possible for a Sole Proprietor to be on the Commercial Marketplace, and if so, how to get verified in such a case.