I mean that you can enroll the iPad as a Shared iPad. This action doesn’t need Company Portal app. After configuring the Shared iPad, a user can sign in on a Shared iPad using their AAD username and password. This automatically creates a Managed Apple ID for the user that matches their AAD username when they sign in on a Shared iPad for the first time. In addition, at first sign-in on a Shared iPad, the user sets up an alphanumeric passcode for their user partition and the apps assigned to the device are installed to the user partition. The next time the user accesses a Shared iPad, they only need to provide their Managed Apple ID (same as their AAD username) and the alphanumeric passcode. See the reference and steps with the following link:
https://learn.microsoft.com/en-us/mem/intune/enrollment/device-enrollment-shared-ipad
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