Thanks so much for your quick response!
I tried both codes but the latter one is causing nothing to show up in the search even though posts are being indexed. And it seems expired posts are still getting indexed with either code.
I’m sure this is an error with my variables or how I have it setup; I’ve tried different variations and can’t seem to figure it out. Even if I could filter out posts that were published before 2016 that would be useful as it seems when rebuilding the index that the oldest posts are added first.