More likely Apple will just write server-side Swift code that we never see.
I really hope they open some, the linux ecosystem for Swift is a little small
dunno about "never see." The last big server-side thing they made (to the best of my knowledge) is SwiftNIO, it's open source, and that was a huge deal for the Vapor project.
IBM's Kitura was never as popular as Vapor or Perfect. Plus, once Apple released SwiftNIO, much of the things people did use Kitura for were made redundant.