https://wccftech.com/finally-a-new-windows-11-build-ni_release-build-22557-drops/

Microsoft's Windows development team is releasing a new build to Insiders in the Dev Channel after a couple of weeks of break. Windows 11 Insider Preview Build 22557 won't be offered to ARM64 PCs.

Windows 11 Insider Preview Build 22557 to the Dev Channel comes from NI_RELEASE, which is a name change for the branch Dev Channel builds usually come from. "The branch in which we release builds from to Insiders in the Dev Channel is irrelevant to the features and improvements included within them," Amanda Langowski and Brandon LeBlanc write. "Going forward we will no longer be noting when these branch changes occur."