Believe me, it's a filter. Troons always use them in their photos to mask how their face and/or body really looks like. Furthermore I doubt he looks much different at the end of the day. The only thing he did was shave his neckbeard and wear tighter fitting clothing but I remember a few pages back at 2019's Momocon (I think it was?), we saw a full body picture of him and he still looked big.Controversial opinion, but Stev looked worse than Izzy if that isn't a filter. Stev never really took care of himself at all.
I just think that he just like most other troons uses filters and in his case, use angle shots.