Klopp has been to 3 CL finals with two clubs not considered super powers. He’s probably anticipating going to more as well.
Alex Ferguson went to 4 in his entire career with the preeminent force in English football at the time
Ancelotti has only been to four in his whole career at top clubs
Wenger made it to one in his whole career
Mourinho has been to two
Conte none
Klopp has usurped most of their careers in the CL in a 12 year stretch at two clubs who were mid table when he picked them up.
He must just be dead good though, trains pressing really hard and a good man manager, that must be it, amazing no one else has thought of it