I heard that AOs verify things partially through LORs, and that it would raise red flags if you have leadership, ECs, and awards not mentioned in the letters.
Do you usually give a list of ECs, leadership positions, and awards to your counselor for when they write your LOR?
At our children’s high school, they provided a “fill-in the blank template”.
You added:
The schools the collegekids attended had something similar for both the GC & the teachers. One other piece was where you were applying, and a space for the student to note anything in particular that they would like highlighted in the LOR (no promise that it would be- just a chance to flag it)