The important thing to consider is that the position should be checked at the 24 hour post surgery exam. At that point the lens position can be adjusted if necessary. The other thing to consider is toric lens is only needed if you want to be eyeglasses free. Astigmatism can be easily corrected and probably more accurately corrected with eyeglasses.
If you do a websearch or medical literature search about 3% of toric lens have to be adjusted post operatively. If they have not rotated by 2-3 months post operative not likely to rotate due to fibrosis around the edge of the toric lens. If the toric has rotated and the patient has no complaints few surgeons would intervene, what are you trying to fix and the rotation carries risks. As far as diagnosis: with a dilated pupil the surgeon can see the orientation and second the post operative glasses testing will show significant resideual astigmatism.