Oracle OCI object storage “buckets” can’t be deleted from OCI dashboard unless they are empty… and no empty option menu exists at all (at least at the time of this post).
Anyway, you can do it using the CLI… Follow these steps:
If you don’t have OCI CLI installed follow this post
oci os object bulk-delete-ns <identitydomainname> -bn <bucketname> oci os bucket delete --bucket-name <bucketname>
Hope it helps! 😉