I was looking for AWS spending for a customer and didn't realize that Cloud Reports defaults to GCP. It was not intuitive to know I had to click on the "Cloud" filter first to add AWS.
It would be nice to see currently-applied filters somewhere as a clue on what might be defaulted and need tweaking. I know in other tools like Kibana, they always have a "breadcrumb trail" row of applied filters impacting the current view.