Announced at the Build 2020 online conference, Microsoft Partners developing application for Azure AD can now set them as verified.
This apply for Microsoft Partners as you required to define your MPN (Microsoft Partner Network) ID, but as you can register for free as a Microsoft Partners you can also register your own organization to set your own application as verified (even if you don’t plan to make them available through the marketplace).
The option is available from the Azure AD portal (https://aad.portal.azure.com/) or Azure portal (https://portal.azure.com) by accessing the Azure Active Directory\App Registrations blade
And then in the Branding blade of the application