In yesterday's match, Manchester City met Wolves, where they were a very easy team to beat. Erling Haaland showed his skills well and managed to take advantage of this opportunity to score many goals which ultimately led Manchester City to win. However, as you said, Manchester City still has a long way to go. There are at least 8 more matches that must be prepared well to always win. The opponent they face is Arsenal, who are currently still in first place on the standings and are only one point away, so there is still a chance for Manchester City to win this season.
Manchester City are one point behind Arsenal but it still lacks one more game in addition to the two last rounds so a total of 9 points comparing to gunners which only could collect 6 points.
Manchester City really needs Haaland in his best form. He can achieve some wins for Manchester City, where he can be a deciding factor. His ability to score goals is unprecedented and Manchester City's players are well adviced to search him, to give him scoring attempts and Haaland will likely convert to goals for Manchester City, which Manchester City really needs in such a tight battle.
I believe Haaland will be a deciding factor for Premier League.