I doubt it. He was way back in most polls and did not have the looks/personality to catch fire with low-attention voters.
So, I don’t think this is entirely true – the harassment allegations happened in late April, and at that point, he was clearly at least third place and occasionally tying for second in the first round. This was all pre-Yang collapse.
No, but he could've siphoned off more support from Wiley but he would've finished 3rd or 4th without the sex scandal. The final 2 would've been Adams and Garcia.
I don’t see how Garcia and Wiley’s surges can be disentangled from Stringer’s fall. Wiley’s surge only happened after she got the endorsements that led to the left consolidation around her, while Garcia’s was after the NYT endorsement. But Stringer pre-scandal already had those left endorsements (e.g. Bowman, Salazar, Brisport; maybe he gets AOC?) while he’s probably a much more natural fit for the NYT endorsement than Garcia was – he got it in 2013 for Comptroller and 2005 for Manhattan BP.