I don’t know when but maybe I did something wrong, I’m starting to organize the shop, but the navigation menu that you see at the top right of the product page is not correct and I don’t know where I can fix this problem
The issue is that you have set globally font size via Elementor. Please navigate to Site Settings -> Typography (https://prnt.sc/23a039k) -> remove font size for the body.
If you want to change the font size globally, on the site we have an option for this. Please, navigate to Theme Settings -> Typography (https://prnt.sc/23a0aii) and set the font size as you want in the “Text font” field.