Anomaly Detection is a great feature which is available in two Workspace visualizations: Freeform tables and Line Charts.
For many years, anomalies would show automatically in Line Charts (provided Anomalies were enabled in the Viz settings) but it has recently been removed.
Now, in order to see anomalies, it's necessary to first drop in a secondary 'time series' breakdown dimension (for example 'Day') in the underlying data table and then select the values in the table in order to see anomalies in the line chart. Even though, it's just a few extra clicks, it is really annoying, especially when reviewing a large number of items. It's also difficult to train internal stakeholders to do this extra step.
According to Client Care, this is not a bug but a feature that has been withdrawn (though I can't find any official documentation, for example in the release notes).