I’ve really got mixed feelings about this feature to the point where I can’t see myself using this. Firstly, security should be built-in through the use of good design choices, not added via some toggle. But sure, let’s consider a toggle that improves security. Why is this getting confused with sideloading? Why should apps have this visibility into my settings?

Overall, the idea stikes me as half-baked and trying to serve too many sometimes conflicting interests.