See Public dashboard without authentication

Hi Syndicate_Admin ,

Parry2k  is correct, you need to assign yourself at least the PowerBI Administrator role to manage the admin portal.

Please try like following steps：

1. In the Microsoft 365 admin center, select Users > Active Users.
2. Select the user that you want to assign the role to.
3. Under Roles, select Manage roles.
4. Expand Show all by category, then select Power BI admin or Power Platform admin.
5. Select Save changes.

For more information，you can refer to：Understanding Power BI administrator roles 

Hope it helps,

Community Support Team _ Caitlyn

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