First off: I don't like Manchester City and I think they are a, sportswashing, plastic club.
I do not know how many or which breaches they will be found guilty of.
I do know however think that they have been spending wisely (although spending a lot) the last decade and that they have been brilliantly managed. Spending a lot more wisely than us and managed a lot better than us. Our lack of success on the football pitch compared to them has not been down to them spending more.
Net spent the last 10 years (from transfermarkt):
Manchester United - 1.187M
Manchester City - 982M
Net spent for other top clubs in Europe the last 10 years:
Chelsea - 860M
PSG - 825M
Arsenal - 791M
Barca - 620M
Spurs - 475M
Liverpool - 381M
Real Madrid - 130M (!)
Net spent the last 5 years (from Transfermarkt):
Manchester United - 612M (Spending big on players like Fred, Maguire, Sancho (might still be a good one), AWB, DvB, Antony (95M !!!) along with some good ones and letting players like: Herrera, Pogba, Lingard (who was valued at 40M for a couple of seasons), Sanchez etc. run their contracts down or force their way out for free) Letting Ronaldo, Zlatan, Sanchez, Cavani, Pogba etc. totally blow up our wage structure at the same time.
Manchester City - 258M (despite transfers like Grealish, Haaland, Dias, Ake, Phillips, Rodri, Cancelo and Mahrez in, who were all "expensive" - The did good business with departures like: Sterling, Sane, Jesus, Zinchenko, Danilo, Torres, Otamendi, Douglas Luiz, Diaz, Angelino, Harrison etc.)
We need proof to claim anything off the books.
We have bought short term "stop gaps" with high wages and expensive gambles while they have bought and got rid with more success.
I'm not a fan of a super league and I don't think City should be relegated, so if City is found guilty of the breaches they are accused of I hope they get points deducted (around 30 points) and a minimum 2 year transfer ban.
Let's see how it ends, but it wouldn't surprise me to see them worm out of it and walk with little more than a slap on the wrist.