Most, not all, Ivy athletes who matriculate score in the 1200 to 1300 range on the SAT. There are no sports scholarships in the Ivy League.
These are the old SAT scores I’m referencing...I have no idea how the new scoring numbers work. A 1300 SAT from back in the day (the 1980s) put you at the 90th percentile, which was more than adequate to do coursework at the Ivy level.
But usually not nearly enough for admission unless a legacy, favored minority, varsity athlete, “sparse country”, spawn of a big celebrity or massive donor, killer oboe player, etc.
And as to “adequate work”, the gentleman’s C originated in the Ivy League, but those scores would likely leave one lost in certain classes and majors.
*And the gentleman’s C is now a his/her/their baseline A-.