Just to clarify some terms
Listing agent represents the seller
Buyer's agent represents the buyer
The term "Selling agent" refers to the agent that sells the home to a buyer, i.e. same as "buyer's agent".
The following is not legal advice.
When a buyer has an inspection performed, they pay for it. If the buyer decides to give the owner of the property a copy of the report, which is common, particularly when they want to negotiate repairs, that the owner (and their agent) then have knowledge is must disclose that report to others (IMHO).
If the buyer does not give a copy to the owner, then they have no knowledge,
The rule on disclosures is that the owner and agent must disclose to buyers any information that is material in nature. Material means would cause a buyer to change their mind about buying (either to buy, or not to buy).