So Peter might have recommended Paul's teachings but he couldn't have known what Paul was teaching otherwise he would not have endorsed it.
And even though Peter and the other apostles met with Paul and confirmed that his wisdom and teachings were God given they must have been mistaken. Because they couldn't have said that given what Paul wrote even though that is exactly what they did say.
Pretzel logic.
None of Paul's writings were secret.
So Peter might have recommended Paul’s teachings but he couldn’t have known what Paul was teaching otherwise he would not have endorsed it.
Should some one tell the world you are a thief unless they can prove it? I say no.
If some one else thinks it is ok to accuse some one with out proof then they can just say so, not much point in trying to cover it up.