Most real estate listing using a type of "HDR" exposure stacking due to the difficulty in taking photos of rooms that exposure the interior correctly and also expose the view from the windows in the same photo. It doesn't show things that aren't there, and personally I see it as acceptable, but I could see some law accidentally making it illegal.

Obviously not, though they may count as misleading image manipulation, and should be similarly regulated. The problem is subjectivity - AI is just a convenient bright line with an easy definition.

No but we used to call that “photoshopping an image” for a reason, especially when done to an extreme.

I'm sure soon enough dating apps will get smart and instead of the "you have no matches" they will make some fake AI matches so you have a feeling that something is happening and you have a chance of actually meeting someone.