CBSE Grades

Is 80.6% in class 11 a red flag for ivy league colleges. I have 9.8 CGPA in 10th

No, they know it typically dips to 75 or so. Make sure your Class XII results are good.

I think it’s chill, most colleges know that Indian schools mark tough in 11th.
On another note, did you get an email for an interview yet?