The Premier League will only have access to Manchester City's official emails and documents. For example, Simon Pearce used his Executive Affairs Authority (EAA) email address in communications related to the club's financial matters. There is no way the Premier League would be granted access to emails from the UAE Executive Affairs Authority. Rui Pinto, on the other hand, might have had access to such communications.
Pinto's lawyer believed they had presented enough evidence against City. He mentioned that they were shocked when they heard the CAS verdict. I also think that holding onto a hard drive or two serves as a good life insurance.
I have no idea, but it has been confirmed by the French anti-corruption agency that the data has been shared with Germany, Belgium, and other countries.