On my front-end (connected to Strapi V4 back-end), I found this solution to display a french date format :
// INPUT
const date = '2023-09-19T12:12:24.261Z';
// FUNCTION
function convertToFrenchDate(date) {
const dateSubString = date.substring(0, 10) // "2023-09-19"
const splitDate = dateSubString.split("-") // ["2023", "09", "19"]
const finalDate = `${splitDate[2]}-${splitDate[1]}-${splitDate[0]}` // "19-09-2023"
return finalDate
}
// OUTPUT
console.log(convertToFrenchDate(date))
// "19-09-2023"