Yes, unfortunately the quests that rewarded higher item level equipment were nerfed by the Scaling feature of patch 7.3.5. There was a time, between 7.3.5's initial release, and the most recent BfA pre-patch where every item (whether dropped by a mob, or rewarded from a quest) would scale depending on your level. (This meant no more item level 30 rewards from the Stockade quests, or no item level 32 quest rewards from Ashenvale.)
Every single item in low level range that has been scaled with that feature (from 7.3.5) has been effected by the item level squish that came with BfA pre-patch. So what was UP-scaled to item level 26, has now been DOWN-scaled to item level 23, and the given items' stats were reduced (The difference you are seeing between some people's item level 32 Argus rings, and the newly obtainable item level 20 Argus rings.)
The thing to note now is: item level directly dictates the value of stats on gear. And since all suffixes have been removed, majority of the items have a pretty healthy combination of primary and secondary stats. In short: Your best bet is to search for item level 25 greens. With the most recent patch, not all green BoE drops scale, I would say the percentage of scaled items you get from mobs is roughly 30% - 40% to non-scaled 60% - 70%. And Treasure Chests have 100% chance to drop non-scaled items.
So I direct you to a small guide I put together for hunting Treasure Chests for 10-19s and 20-29s:
https://xpoff.com/threads/fatal-treasure-chest-hunting-guide.78533/
I hope it helps you gear your charaters.
Good luck!