Is it possible to use GIT without access to the backend?

Question

git

There is a project in Python Flask
. A lot of private information is used on the backend, which should not be available to Frontend Developers.
How then can one use GIT or something similar?

Answer 1

Are you working on the sale?
Make yourself a Development environment on which the back will use artificial data instead of real ones. Well, or even write a back simulator.
And here I don’t understand the git at all - the code is separate, the configuration is separate, the data is separate!

Answer 2

.gitignore or what kind of information?