Will this help? Duration seems to work with operators.

https://blacksmithgu.github.io/obsidian-dataview/annotation/types-of-metadata/#:~:text=dateformat function.-,Duration,-Durations are text

I'm on mobile right now so I can't try it out but I'm curious if this will work in your case!

I've noticed this too. Comparing All+New with other instances, this instance is not retrieving most of the posts from the network. How do we reach the instance owner?