fstop adjustment missing from iOS 18.3.2

Prior to a recent update of iOS, when I took a photo in "Portrait" mode, when I went to edit this, it could allow me to adjust the depth of field (fstop). That option has now been removed. It is replaced by a "styles" icon, which I don't care for. I can't see that fstop adjustment is activated by any swipe, etc.

I'd like to get that option back, but it's not clear to me where it got moved to in the UI or if this was just summarily removed. If there is a preference setting, I'd be all for having this adjustment back, as I used it a lot.

Anyone know what the issue is here?