This week's elections were a surprise and President macron did, indeed, stop Marine LePen's Right Wing party from taking control.
The result, Macron's party is no longer in complete control and he will have to work hard to come up with a palatable choice for Prime Minister.
Check out this article to further understand some of the issues of the new French Government https://warontherocks.com/2024/06/what-frances-surprise-elections-could-mean-for-its-relations-with-the-world/