Later this year, Apple will introduce a new workflow for manually installing configuration profiles in order to improve platform security for all users.
This workflow requires additional steps for users to install profiles from a website or an email message. There are no changes to profiles installed by Mobile Device Management (MDM) or for MDM enrollment to servers assigned in Apple Business Manager or in Apple School Manager. After you enroll in MDM, additional profiles can be installed without any interaction from the user.
To preview this change, download betas from AppleSeed for IT, Apple Developer Program, and Apple Beta Software Program.