Looking back you were still spraying poly on 27th June, or is that just when you posted the pics and wrote the words? If so it's been a maximum of seven days since the last coats went on, maybe less if you sprayed after that. You'd normally wait 2 weeks minimum before polishing (though I often do my first sand level sooner as the rougher surface gives a greater surface drying area). And if you've put a lot of coats on, it's gong to take longer than two weeks.

How long was the poly drying for?