ICYMI, this WWDC talk highlights some of the recent features of the Swift VS Code plugin https://youtu.be/Pvf8OLnAUGI?si=diOnO9_ORWrlpCbC&t=187. This includes background indexing, project panel as well as documentation live preview.
The documentation live preview allows you to see a side-by-side live preview of your documentation as you edit it with the Swift extension for VS Code. Note this feature is only available when using a Swift toolchain 6.2 or higher running on macOS or Linux. To learn more (and see a cool gif of it in action!), check out the user docs here Documentation
Tracy