Xcode 13.3 RC 1 was released on 8 Mar 2022 and requires macOS 12.0+.
It can be downloaded from https://download.developer.apple.com/Developer_Tools/Xcode_13.3_Release_Candidate/Xcode_13.3_Release_Candidate.xip.
Release notes are located at https://developer.apple.com/documentation/xcode-release-notes/xcode-13_3-release-notes.
The SDKs it contains are:
- iOS 15.4 (Build 19E239)
- macOS 12.3 (Build 21E226)
- tvOS 15.4 (Build 19L439)
- watchOS 8.5 (Build 19T241)
The compilers it contains are:
- clang 13.1.6 (Build 1316.0.21.2)
- swift 5.6 (Build 5.6.0.323.62)