Can't configure automation on "VOC index value" with Home Assistant native integration

I’m trying to configure an automation that sends a notification when the “VOC index” value that the new native Home Assistant integration supplies, but when creating an “if” condition in the visual editor for this automation in Home Assistant, the “Above” and “Below” fields don’t show when this attribute is selected. Other attributes do behave as expected. Interestingly, the NOx index also has the same problem.