2 IPL treatments only made brown spots appear (that were not visible to naked eye before) but no flaking? (photos)

You need more treatments and this is why IPL is done as a series. Additionally some of the spots on your face are seborrheic keratosis (SKs) which are not going to resolve from IPL or resurfacing treatments. They will need cryotherapy (liquid nitrogen). In my office if people have SKs in the treatment area, I will treat these for free because there are no laser treatments that will work on these, so I include it as part of their package. "This answer has been solicited without seeing this patient and cannot be held as true medical advice, but only opinion. Seek in-person treatment with a trained medical professional for appropriate care."