I have to agree with you that the dust spots here are very small, and you have to look hard using the 'equalise' function. But once you spot them they can be seen (with my glasses on and squinting
They are easier to spot on the first photo, where there are 2 above the mountain which is above the front of the fuselage (mid way between the mountain and the top of the frame). There is also a third at that level by the right edge of the frame. These same spots can also be seen on the second photo, together with another that I spotted further to the left (at a similar level).
Hope this helps.