Doubt it.
Chelsea currently only have Enzo, Gallagher & some unproven kids that play in the double pivot. They're not going to suddenly sell Gallagher because they're signing one more that can play there.
What do you mean "exactly"? Kane had 3 Premier League goals to his name on his 21st Birthday. He also absolutely stunk the place out at Norwich and Leicester on loan.
Not every striker that turns world class is some teenage phenom like Haaland.