I've had this issue happened to me twice now. I'm working in a project and the previews for my SwiftUI views won't show. The entire preview pane is just not there. The only way I've been able to fix it is recreating the project again.
This happened to me in both Xcode 13 (Intel based Mac) and 14 (M1 Mac). Is this a known issue or is there a setting I'm missing to enable and disable previews in a SwiftUI project?