I just changed those exact settings on my
Air 2 with
SC - but honest to gosh can't tell you how I got there. I am at DJI Fly v1.4.8.
But it was below another group of settings and not exactly where I'd look for such things. I think is was in an Advanced menu of some sort. All I can say is spend more time poking around the DJI Fly UI.
Also - which drone you are flying changes the UI. A
Mini 2 may not have those settings. And, what I find most annoying is there is no DJI Fly manual specific to a single drone - everything is lumped cut and paste. The manual says nothing about the obstacle avoidance icon - yet, there it is.