Metric list tree view

I have a Grafana server running v7.4.2, and its query editor has a tree view for the metrics list.

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I am bringing up a new server via helm, and it installs v9.0.5. I notice the tree view isn’t there anymore. Since the metrics list is ginormous, my new setup is unfriendly.

Is there an option somewhere to turn on the metric name grouping, or is it a deprecated feature?