You require space admin permission to delete the space. As you don't have space admin permission you don't see additional tabs.
Please refer below documentation for more details.
Hello Alexandre and welcome to the Community!
Thanks for reporting this issue and providing detailed steps as to what you’ve done which resulted in the issue. The issue looks to be similar to a Cloud free bug which is preventing users (Admins) of a newly created space from being able to administer said space. Further information on this bug may be found at CONFCLOUD-68319. We ask you to please vote and watch this bug to receive updates on its status.
Thanks again for reporting this issue within Community!
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