ArcGIS Online Early Adopter Community March 2020 beta update was closed in April 1st. Please direct any of your questions of March 2020 ArcGIS Online release with Esri Technical Support. We look forward to the next beta update sometime in May or June 2020. We are continuing accepting the new participants to the Early Adopter Community but please be aware that we will invite you to the QA site and share the login credentials with you around the time when Early Adopter program for next beta update opens. Please come back to the Early Adopter Community or watch your email for our next announcement.
The ArcGIS Online beta team