What apple device takes photos with a resolution of 2250px x 3000px?
i think the photo was cropped because that image is 6.75 megabytes and i don't know of an Apple device with a 6.75 megapixel camera. The small camera on the new ipad pros are 2320 x 3088. it cold easily be a slightly cropped image from an ipad pro. 

The main Camera on the ipad pro is about 12 megapixels or 4032 X 3024 = 12.192768 Megapixels. This could also easily be cropped to your size.

I don't know what sizes the newer iPhone cameras are but your probably looking foe a 7-meg camera or larger.