This is because you are not a global admin, only an admin can grant admin consent, you need to switch to the global admin login in the Azure portal.
Or you can use the Admin Consent URL, you just need to run that URL in your browser, then have your global admin log in and consent on behalf of your organization, after that you'll see in the API Permissions blade that your permissions have been granted admin consent.
https://login.microsoftonline.com/{tenant-id}/adminconsent?client_id={client-id}
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.