Supplemental research abstract?

Hello!
I will be applying to some very competitive schools as class of 2023 (Harvard, Princeton, Stanford etc.), and I am wondering if I should submit a scientific abstract. I have done research at a local university since freshman year, and I have spent my summers interning and doing research at a Stanford lab. While I have not participated in science competitions, my lab at Stanford has co-authored me on an abstract (they are still working on paper, I will most likely be co-author for that as well) for an international conference in the field, but I am not the first author. Should I send in this abstract or should I write one separately for college apps?
Thanks!