'Delete' or 'Refresh' button not available for sandbox

This behavior is expected and works as designed. The options to delete or refresh a sandbox will only become available when the sandbox has completed activation and if its corresponding refresh window or interval has passed.

Specifically:

• There is a 24-hour grace period before a cloned or refreshed Developer and Developer Pro sandbox can be deleted. You will need to wait until after 24 hours from when the Sandbox was created before you can delete it.

   

To check the available options for your sandbox environments, navigate in Salesforce Setup:

• In Salesforce Classic: Go to Setup > Deploy > Sandboxes
• In Lightning Experience: Go to Setup > Environment > Sandboxes

Note: If the sandbox is not recently created or refreshed, or if the refresh interval has already passed, and you still do not have the 'Delete' or 'Refresh' button (including the option to create a new sandbox), this could be due to an expired sandbox license. In such cases, please reach out to Salesforce Support to confirm.