Invisible page.?

Hi, I have an online page. : https://www.audit-renov-energetique.fr/portfolio-collections/my-portfolio/the-presidio-house-1
that is found in my wix pages dashboard, but as it’s a portofolio page, I can’t change the name of the page (it’s the theme name), and I want to change this name.

Any idea. ?
thanks a lot
alban