Having been a teacher since 2004 and done many Ofsted inspections in all it’s different guises and I can tell you with great certainty that teachers have very little input to the outcome of a judgement and very few lessons are often seen in these new short inspections.
Usually, Ofsted come with a pre-conceived idea based on the data (and in particular, value-added) and visit very few classes now as a result and instead have meetings with lots of people to explain their paperwork.
Reasons for past inspections being a Good and not outstanding in past schools I have been in:
There was a small gap (even though no human could get through it and was about .06 miles from the school itself) in one of the fences that hadn’t been fixed so failed on safeguarding.
Received outstanding in all areas but because English results were not quite as high in terms of improvement over Maths (even though they had improved), downgraded to Good again (and this was because of the exam debacle, which changed grade boundaries massively between March and June, where the High Court deemed it unlawful but the Ofsted inspectors said, quote, ‘We don’t follow those rulings’
Another occasion the reason for a Good outcome was given as, we had 4 outstanding and 1 good judgement (in administration) but that means we have to be Good overall apparently.
Don’t forget, OP, that until very recently, some Outstanding schools were going 13 years without having been inspected and there would be staff there who had never been in an inspection, so no idea if they are ‘dynamic’ or not etc.
Ofsted inspections are just a game of cat and mouse with the cat changing the rules and goalposts each time they come.