Expectation because of the insane resources he has at his disposal.
Since he moved to City, Real Madrid have reached 3 CL finals and Liverpool have reached 3.
Manager wise Klopp has reached 3 (Won 1 and 1 pending), Zidane has reached 2 (won 2) and Tuchel has reached 2 (won 1).
Basically he has been as successful in Europe as Mauricio Pochettino.
So there has to be the expectation to win it given 3 other managers have reached more finals (and won it) since 2016. It also removes the arguement of luck being involved.