Neowin published an update on the Fresh start feature in Windows 10 May 2020 Update. The feature is not broken but has been relocated in the latest Windows update.

Microsoft updates device and performance health page to clarify the removal of Fresh start

We recently reported that the Fresh start feature on version 2004 is broken. Now Microsoft has updated its support page to clarify that the feature was moved to a different location and is not broken.

Microsoft updates device and performance health page to clarify the removal of Fresh start