Actions such as Remove, Reset, Reset Passcode are not available in self service portal when device is enrolled by a Device Enrollment Manage
Actions such as Remove, Reset, Reset Passcode are not available in self service portal will not be visible either in company portal or in self service portal i.e. portal.manage.microsoft.com when a user who has Device Enrollment Manager role assigned enrolls a device.
Nathan Barnett commented
[MSFT Tech writer] We are confirming this limitation in the documentation. If this is a request for different functionality, please add and vote in "Mobile device management"