That’s the thing, though. They DID detect as mutants by Cerebro. Which also means that they were recorded, because, as you said, they’d show up as red flags. It hasn’t really been explained, but when it does, it’ll either be “Wanda magic” or that they really were mutants and the High Evolutionary lied (GASP!).
Those editors who say no to Wiccan and Speed being mutants should be fired.
As usual, this just hurts Speed, like the retcon hurts Pietro cause Wanda and Billy can just default to the Magic side of Marvel, but just having powers with no real lore to tie you over for the most part means you basically don't exist.
I’m just glad Justice has steered clear... also glad they haven’t tried to de-mutant him.