The Xcode 27.0.0 Beta 4 image has been released and can be selected as follows:
macos:
xcode: 27.0.0
Apple Developer Documentation
Xcode 27.0 Release Notes | Apple Developer Documentation
Apple Silicon VM Image Info
Xcode 27.0 Build version 27A5228h is installed at /Applications/Xcode-27.app
The full manifest of installed software can be found here