That changed with the most recent update. You now have options for color space in your Sequence settings dialog, the Scopes panel options, and from the Project panel, for each clip in the Modify/Interpret Footage options down at the bottom for color management. You set your HDR material there, and at the moment it's realistically set for HLG/PQ as that's what a number of major commercial clients apparently needed first.
Here's their page on the changes ... and typically, you have to know how to hunt for it to find it. Sheesh.