Thank you very much for the clarification.
Now I know that quixel bridge models are not meant to be viewed from the back. But what about models that I imported from external websites? I imported a 3d model of a house which was shown as rendered two-sided on a screenshot on the website, but was only rendered one-sided in ue5.
Example:
Edit:
I found the solution. It was a setting in the material named “Two sided”.