Hey @tamph.ptf! Happy to help here.
additionalScope is definitely the way to pass dynamic values into a query when you trigger it.
Looking at your index query, it seems like you're almost there!
The additionalScope object should look something more like
...
additionalScope: {
date: new Date()
}
...
Here's a community post that goes over additionalScope with a couple more examples! Let me know if you have any questions at all 