WP Requirements Compliant Badge
This is an author level badge, which is awarded by Envato. It will only be awarded to authors who have passed the spot check process, ie all items meet the current/updated published requirements (for themes and plugins respectively).
this applies to plugin authors as well. Your plugin needs to meet the current plugin requirements by 31 May 2019. If they meet the requirements earlier than that, you can nominate for a spot check and if you pass, you will get the WP Requirements Compliant badge.
More Information here from @StephenCronin