Smart splitting belts
I guess the idea comes from what I've seen on other automation games I've played. The fastest to come to mind with this function is Satisfactory with its smart splitters (in our case, we'd have the conveyor belt splitter but in a smart form), which allows us to filter what items go to the left and what items go to the right, allowing for much cleaner sorting systems (currently there is a way of doing that, via robot arms, but because robot arms have a downtime in which they cannot pick items while turned around to drop the current item, it makes it for a very inefficient sorting system when high throughput exists).
I've attached a mockup of how I'd see the UI for this look like.