Horizon Instant Clones and NSX-T VLAN backed segment....

I'm not sure if this is a Horizon question or an NSX-T question, but the person with the answer is probably here rather than in the Horizon forum. I have an existing Horizon pod that works fine. NSX-T is installed and works fine. I can put a machine into my VLAN backed segments and they work.

However, in Horizon on the pool vCenter tab where you select networks for your pool, no N-VDS networks show up. I need my pools to create new machines in the VLAN backed segments so I can use micro-seg but that doesn't look possible.

Versions involved:

Horizon 7.10

NSX-T 2.5

Thanks for any insight!