[Python] How I assert the ordered list descending in Robot Framework?

I have a problem when trying to assert some results related to the ordered list (descending). The result is the created_at and the value is the date format.

Here are some examples:

${created_at}= "2022-02-28", "2022-02-27", "2022-02-26", "2022-02-25"


I need to verify that the created_at should be the newest.

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