best response confirmed by bcrosnier (New Contributor)
Solution
Hello, yes. Approvals has been GA for a couple of months.
https://gorovian.000webhostapp.com/?exam=t5/microsoft-teams-blog/approvals-in-microsoft-teams-now-general...

For reference.
https://docs.microsoft.com/en-us/microsoftteams/approval-admin
https://myteamsday.com/2021/02/03/approvals/

You don't mention how long you've waited. But minutes can sometimes be hours. Give it some time or open up a support ticket if it doesn't work.
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