Is it possible to share the same privateLink in Deno Subhosting?

Recently we are trying to implement a "custom js function" module in Deno Subhosting, our concern is about the performance and latency, since our product is a cloud database, so we need our custom function(hosted in Deno Subhosting) to interact with our cloud database for fetching data. After the search, we found this: https://deno.com/subhosting/docs/endpoints-and-regions to make endpoints have the same region to our data service.

Question1: Any other suggestions for the performance, especially interact with other services?
Question2: We saw the Enterprise License had a upcoming feature, deploy on your own cloud, when will this feature release?

Thanks