I really don't think that it will be that easy as you are making it looks like, because arsenal are also facing a similar problem, even though they have managed the injuries in their squad properly, and if you pay close attention to the arsenal line up in the past few games, they have been missing the likes of Saka and martinelli, which to me is a very big miss to any team in the premier league due to their form and quality, but I really Don't think Manchester city will be a push over regardless of the injury crisis they are facing in their team, I believe that they have enough debth in their squad to cover up for the injuries they are facing.
Both teams are having trouble due to injuries but still we have to check Arsenal is having better options for the replacement with Manchester City is having trouble to score while their few top players are not available like in last five games in Premier League we have 7 goals for the Manchester City and 23 goals for the Arsenal so this all is clearly giving all how things are going into these both sides.
Arsenal able to have better depth into their squad and things are manageable for them even they are missing their top players from the squad, but Manchester City is feeling heat as their performance is having big decline which is surely not ideal for their campaign for the defending their title in this season because their list of the injured players are going long which is surely big concern for them at this stage while they are having opponents like Arsenal and Real Madrid.