Microsoft have released a cumulative update for build 22572 for Windows Insiders on the dev channel. KB5012817 takes the build to 22572.100 and is for Microsoft to test their servicing pipeline, so that means there isn’t anything new in the update.
UPDATE 3/11: We are starting to roll out Cumulative Update Build 22572.100 (KB5012817). This update does not include anything new and is designed to test our servicing pipeline for builds in the Dev Channel.
22572 was released to Windows Insiders last week and contains many fixes. Here is my hands on video: