Please let me open the scanner, click on a chest on the left, and give that chest a filter. regardless of if it's supported by the chest. Instead, the scanner itself is doing the condition checking, and if the condition isn't met then the item in question just sits on the input box or goes to the next valid route.

this will make it so i can put filters even on vanilla chest or other mods.

also, i'm playing on sky factory 3, so would be nice if that got it too.

That's not an easy feature I'm afraid. Not closing this right now but it is not something that will happen short-term