Hi John.
We are just wrapping up Queryable Encryption and Vector Search right now and then the next ticket we’re intending to tackle is anonymous projections which would enable these scenarios.
Unfortunately don’t have a specific timeline on it yet.
You might be able to get what you want working on it right now as we did make some minor improvements in the mean time - failing that you can always put a ToList before the Select projection to enable that part to happen client-side.
Hope that helps.