• …examples abound where he does this
This is relevant because:
A) Knowing these bits of Jesus’s biography (geneology, status, sayings/teachings, ethical conduct, miracles, crucifixion details etc.) just is what it means for Paul to know Jesus biography generally.
B) Each known detail implies Paul has source(s) of knowledge on Jesus biography (and so likely knows more than he reports.)
Right?. This is relevant because Jesus biography was pervasive for Paul (hard to avoid and easy to acquire).1
2 Corinthians 5:16 — ”from now on we recognize no one according to the flesh; even though we have known Christ according to the flesh, yet now we know Him in this way no longer.”1
No, Paul is simply saying he no longer sees Jesus from a pre-conversion point of view.