I've noticed the in-editor search for published styles doesn't return the same results as when you search online, but I wasn't finding anything remotely resembling any of the "big name" universal standards. I was surprised that styles_esri didn't have them published, I've got to figure someone's made a style of them somewhere - it doesn't make sense to reinvent the wheel!
Is there somewhere else I should be looking?
I get a lot of my styles from here: https://esri-styles.maps.arcgis.com/home/group.html?sortField=modified&sortOrder=desc&id=2625fd75429...
Search styles outside of Esri here: https://livingatlas.arcgis.com/en/browse/?q=desktop%20style#d=2&q=desktop+style&type=tool
Otherwise I go searching through my state specific sites or public agol pages to see how their layers are symbolized aka search state's DOT.