Hello,
Please make sure that you are following the pre-requisites mentioned;
The tenant requirement is:
- Must be a commercial, worldwide public sector, EDU, or non-profit tenant.
- At general release, Microsoft won’t offer an EDU-specific license or EDU discounts for Teams Premium.
- GCC, GCC High, and DoD licenses will become available sometime after the general release.
The user requirement is:
- An Office 365 or Microsoft 365 subscription with Teams.
Please refer; https://learn.microsoft.com/en-us/MicrosoftTeams/teams-add-on-licensing/licensing-enhance-teams
If the above is already met and you have already assign the premium license for a week or so, then please reach out to MS Support team and open a ticket with them to investigate.
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