It sounds like you're referring to a specific article or post titled "La mature elle assure" (which roughly translates from French as "The mature woman delivers" or "She’s got it handled"). While there isn't a single globally famous "write-up" by that exact name in recent major headlines, the phrase is a common sentiment in French-speaking lifestyle and wellness circles, often celebrating the confidence and capability of women as they age.
To understand the phrase, we have to take it apart and look at the slang context. la mature elle assure
💪