Build 28020.2075 is not mentioned in the provided release notes. The latest documented Experimental (26H1) / Canary 28000-series build in the context is 28020.1921, which is already live in Windows Update for devices in that channel and is described as including general improvements and fixes.
For Canary / Experimental (26H1) devices:
- These builds are unstable, may have limited documentation, and features can change or be removed.
- Features are rolled out gradually using Controlled Feature Rollout, so availability can vary by device.
- To be among the first to receive new features, enable the toggle under Settings > Windows Update (for Canary) or use the Feature flags page under Settings > Windows Update > Windows Insider Program (for Experimental (26H1)).
- To see which build is currently in which channel, use Flight Hub.
If a newer build such as 28020.2075 is visible on a device’s Windows Update but not yet documented, it follows the same Insider guidance: it may be an incremental update with limited or delayed release notes and is part of the ongoing transition from Canary 28000-series to the Experimental (26H1) channel.
References:
- Windows 11 Insider Experimental (26H1) Preview Build 28020.1873
- Windows 11 Insider Experimental (26H1) Preview Build 28020.1921
- Windows 11 Insider Experimental (Future Platforms) Preview Build 29576.1000
- Windows 11 Insider Experimental (Future Platforms) Preview Build 29580.1000
- Is it possible to Left the Insider Program and Install Stable 25H2? - Microsoft Q&A
- How to install 25H2 enablement package? - Microsoft Q&A
- Any Updates from windows 11 release preview 26220.6690 - Microsoft Q&A
- Release Preview channel seems to be missing - Microsoft Q&A
- Windows 11 Setup Mode Issue and Corruption Recovery - Microsoft Q&A