Alongside of a new Fast ring build, Microsoft today released a new cumulative update for Windows 10 20H1 in the Slow ring. The update is to test servicing, so there are no changes.
Build 19025 RSS
Microsoft today announced that it's releasing Windows 10 Insider Preview build 19025.1051 to the Slow ring. There are no new features from the last one that was made available last week.
Microsoft today released its second Windows 10 Insider Preview build in the Fast ring for this week, bringing the build number to 19025. There aren't any new features, just a bunch of fixes.