I believe this is on the roadmap for a future release for native support. I think the product right now does not data collect the cluster but collects the individual stores.
I haven't tried it but you should be able to still provision directly to the stores. You might then be able to storage policies in vcac manually that match the storage cluster in vsphere which will provision directly to the datastores. This would use the vcac placement logic rather than the optimized DRS algorithm, but will allow you to implement the recommendations manually or automatically.
Might not be exactly what you're looking for but it could be an option.