I still think Manchester city doesn’t depend wholly on the abilities of Haaland as a striker to score goals.
Of course you're right, and so far this season it's been noted that at least 12 different players have scored in the Champions League including Haaland. The team's current top scorer is Haaland with 12 goals from 10 matches, then Mahrez, Alvarez and Bernardo Silva each scored 3 goals.
You can see the full statistics here:
Manchester City's top scorer in the Champions League 2022/2023.No doubt, Haaland is a very talented striker and Manchester City’s strength may have increased a bit with him on the squad. He’s a big and energetic striker who’s also moves quickly and opens up beautifully for passes or crosses from other teammates to score goals.
I wouldn’t say Gabriel Jesus is not as good as Haaland. Gabriel Jesus is a more experienced player than Haaland. Haaland has his youthful energy as well as his height and build and he uses all that to the best of his ability.
Jesus is good player, but his goals and finishing stats are not as good as Haaland's I think. You can compare the two players based on the goalscoring stats, but of course Jesus has more experience in the Premier League than Haaland who is just finishing his first season.