Hello,
I don’t really know what the problem is, but I have the impression that the style.css of my child theme is not taken into account when my site is live.
I noticed an important thing, when I am connected to the site everything is displayed correctly, but when I am disconnected, it is a disaster.
The problem occurs only when the site is live and I am disconnected. I put the site live you will see.
Important, you must be logged out of the back office