Ask HN: How to mock microservices endpoints using HTTPS with TLS encryption?

I am a professor at the University of Michigan, and I am trying to better understand testing and mocking, in the context of a research project. Is is possible to mock endpoints that use HTTPS with TLS encryption? Do you know of any mocking tools that handle that capability? Intuitively, it might not be possible to convincingly simulate and mock the encryption, and I am wondering if there are any techniques or tools that are able to get around that limitation.