Per
@Sunshine2021's advice, I emailed Mary Keefe from Yale about my application. After Columbia reached out about awaiting a GRE score this morning, I figured something similar may have happened with my other schools. I think admissions received so many emails that my GRE update may have been lost in an inbox, which is totally understandable!
It turned out my application was marked complete, but was not under review because they were waiting for a GRE score. She said it will not adversely impact the review of my application. I've been moved to the review pile and should have a decision from Yale in 7-10 days!
Just a heads up for anyone else who submitted their apps saying they were expecting a GRE score, but ended up not submitting one!