I have PowerApp form with multiple data cards with Dropdown and other fields. These field's visible property is set based on dropdown value.
As soon as the visible property formula is set, the datacard is invisible in the design canvas. Because of which if I reorder the datacard then the position of those datacards are automatically moved all over the place. If these is a form mode called Design mode then we can make that visible property visible during design mode and in run mode, it can become visible/invisible.
The other possibility could be to always make those controls visible in design mode irrespective of the formula. This might have some pros and cons but the automatic position chaning is not really good.