In Experience Builder, when setting up a filter widget, there is currently no option to remove the "All" option if you use a Unique source. This is incredibly frustrating as this functionality has always existed in Dashboards. I have mutually exclusive layers and showing them all will break the logic of several components of my experience and confuse the intended users.
I could work around this if I was using snapshot data, but this needs to be live and react to new data, so prepossessing another layer or using the predefined option for filter source is a no-go.
Is it really possible that no one imagined we'd have to filter mutually exclusive layers on live data in Experience Builder? I'm going to have to scrap a lot of work and go back to Dashboards because of this.