I just opened up ArcGIS online for the first time in a few weeks and I see their new map view is out. I'm trying to get comfortable with it, but I'm struggling to find the sublayers option for layers that have more than one sublayer. For example, for these LANDFIRE layers, there are multiple sublayers you can access. With the classic map viewer, they're easy to navigate:
Under the content section you can clearly see the sublayers and toggle them on and off.
Now in the new UI:

For the life of me I don't see anywhere you can look through the different sublayers. I must be missing something obvious here?