Managing and creating activity alerts in the Security and Compliance section

Hi ,

  I'd like to how to add a new email recipeint to an existing activity alert that has already been created . For some reason I'm not able to see the "Manage alerts" option as described in this article below in the Security and Complaince center.

https://support.office.com/en-us/article/create-activity-alerts-in-the-office-365-security-compliance-center-72bbad69-035b-4d33-b8f4-549a2743e97d

In addition to that I don't see the "New Alert policy " under audit log search for me . I'm a global admin in my tenant and I don' get that option . Any idea why ? Am I missing something . 

Also , as already stated above , I'd lile to know how to add a new email recipeint to an existing alert policy