looker Whitelabel

am trying to discover whitelablel features in order to customize our looker dashboard to start embedding in our facing web app but as am reading the old threads i found out that Whitelabel option was found on admin section on looker while i can't find it right now but am pretty sure our business user enable it how i can double check that its enable ? or its deprecated and what is currently available is using API to update it only ?

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