I've just started testing the iPadOS 13 beta and experienced an initial issue with enrollment via Intune Company Portal. The app would fail to download the MDM enrollment profile and instead display the page below.
To fix this, go to Settings > Safari > Request Desktop Website and toggle off All Websites. This setting is enabled by default in iPadOS 13, unlike iOS 13 which has it off by default.
@Vadivelu B There's nothing official about support for iOS/iPadOS 13 in current Intune tenants, but day zero support is listed on Microsoft 365 Roadmap. So far, the existing configuration, app protection, and compliance policies that I have set are working as expected.