Vector search is now supported in EF10 and we should see if we can support it. The API uses Where with EF.Functions.VectorDistance, e.g.

var topSimilarBlogs = context.Blogs
.OrderBy(b => EF.Functions.VectorDistance("cosine", b.Embedding, sqlVector))

Additionally both the fluent APIs:

• IsVectorProperty()
• IsVectorIndex()

Can be used in defining the model.

https://learn.microsoft.com/en-us/ef/core/what-is-new/ef-core-10.0/whatsnew