Teams that spend more time on the ball, more time in and around the opposition penalty area and less time defending in their own box are naturally going to concede less penalties than teams who have less possession, spend more time trying to win the ball and spend more time defending in their own box.
That's one of the absolute basic easy to understand fundamentals of football.
And for the record City, United and Chelsea are all among the the sides to have conceded most penalties this season and are traditionally viewed as Sky6 sides. RS & Arsenal have both only conceded 1 which puts them into the same category as similar big teams Forest, Leicester, Palace and Bournemouth. The only side to not concede a PL penalty so far this season are Newcastle.
In terms of Red Cards Arsenal and Southampton have had the most players sent off with 3. City and the RS have only had one player sent off which again puts them in the same company as us, Newcastle, Spurs, Palace, Chelsea, Wolves, Brighton and Brentford.
Bournemouth and Leicester seem to have had no red cards in the PL this season from what I can see.
I'm not entirely sure how these actual facts tally with your 'fixing' theory. But it does tie in with the theory that fans have clear bias and see only what they want to see and will outright make facts up to justify their claims of conspiracy.
Quick edit on the offside note - You literally saw one go against City in favour of Everton the other day. Haaland's disallowed goal after the penalty.