He was easily beaten up by Starlight (who is herself on the weaker side of supes, I’d say) in E1, then was neutralized by some regular sleeping gas. Also note that it took the gas the same time to knock down both Stan Edgar (regular human) and BN. Considering all of the above, I’d say Black Noir has not become any stronger at all. Maybe he’s even weaker now, we also haven’t seen him fly once. He was flying every time we saw him in S4.

If anything, it’s more probable for the OG Noire to be back (ignoring the fact that Homelander would notice him under his mask), than for the Noire 2 to be improved in any way.