See Announcing Windows 11 Insider Preview Build 22449 | Windows Insider Blog for features, fixes, and known issues.
From the release notes: “You may notice that this build number is higher than the Windows 11 preview builds you’ve been receiving. That’s because we’re moving the Dev Channel back to receiving builds from our active development branch (RS_PRERELEASE). This means the builds released to the Dev Channel no longer match the Windows 11 experience that will be released to customers on October 5th. ”
--Joe