As mentioned in the footnote, this can be done by using PrivateLink; it costs a few bucks too, but it is the way to go if your VPC does not (or must not, for Compliance™ reasons) have internet connectivity.
If your target VPC has neither PrivateLink nor public IPv4 connectivity somewhere, I'm not sure how that would work; I'd love to learn how that was built.
If your target VPC has neither PrivateLink nor public IPv4 connectivity somewhere, I'm not sure how that would work; I'd love to learn how that was built.