That the Government has a duty to disclose superior knowledge to a contractor is established law. I find nothing that says the Government should disclose superior knowledge to offerors, however.
Is there anything that says that the Government should disclose superior information to offerors?
I am thinking in particular to about the clause at 52.222-17, Nondisplacement of Qualified Workers. The Government would usually know the names of the people it wishes to protect with that clause, and have relevant contact information, while most offerors would not. An incumbent might, but others probably not.