PlayStore description says:

Android Developer Verification is a Google system service that protects users on certified Android devices by validating the identity of developers for apps installed from the internet. By ensuring every app is linked to a verified developer, this service provides an essential layer of security for your device.

This is likely part of Google’s attempt to close down Android and strengthen its monopoly and data harvesting mania.

Name would suggest it’s part of the upcoming developer verification feature. The one that will prevent installation of any app from a developer not registered with Google, without jumping through some extra hoops.