Microsoft released Windows 10 build 18845 to Insiders on the Skip Ahead subset of the Fast ring today, and while it's light on features, it has plenty of fixes, improvements, and known issues.
Build 18845 RSS
This week's Windows 10 Insider Preview from the 20H1 branch is build 18845, and it's now available in the Skip Ahead subset of the Fast ring. The only major new feature is Emoji 12.0.