The real unsolved problem is lack of visual comparators that could show what really changed between versions. If you try to do diff those text serialization formats (those being yaml, json or, in old days, xml) you have to do a lot of mental gimnastic to map those onto visual changes that are meaningful. And most potential users of your low code tools are not capable enough to use it this way.

If you take into considetation that visual comparators of workflows is extremely hard problem to solve (probably only bunch of people in the whole world is cable enough to do this in a way that anybody sane would use) then you easily see why all visual dev tools of last 30 years went bankrupt. And if you did any sensible research you would know there were hundreds attempts at it with some spending hundreds of millions of dollars (Rational and later IBM being main ofenders here)