Hiding Featured Images on Certain Pages

Hi there, I am trying to hide the featured images on my individual portfolio pages (example here: https://sydneymariecopy.com/?page_id=148) but keep the image noted as the featured image so that it appears as the thumbnail on the main portfolio page (shown here: https://sydneymariecopy.com/?page_id=148). How might I go about hiding individual featured images so that it doesn't make all of my featured images disappear (as they all have the same class)? Thank you in advance! Sydney