See Announcing Windows 11 Insider Preview Build 26120.3360 (Dev and Beta Channels) | Windows Insider Blog for features, fixes, and known issues. From the release notes:
If you are an Insider in the Dev Channel, the window is open to switch from the Dev Channel to the Beta Channel if you would like. This window will only be open for as long as we’re releasing the same 24H2-based updates (same build numbers) across both the Dev and Beta Channels. When the Dev Channel jumps ahead (higher build numbers), the window to switch will close. Please note that switching from the Dev Channel to the Beta Channel may result in the loss of some features temporarily.
IMPORTANT: This window is closing soon, so we highly encourage you to evaluate which channel you would like to be in during this time in which the window to switch is still open.
--Joe
