They have way too many options, and Sterling won't want to be 5th choice. He's below Grealish and Jesus in the pecking order as it is, imagine when Haaland and Alvarez come as well. And he's more than good, it's a waste to keep him on the bench.
He's played more games than either this season, and is a better player than either too. Pretty sure Jesus will be off in the summer when Haaland comes, and Sterling will remain at City as someone who can play all 3 attacking positions to a high standard.