Thank @eakorolev. Although this doesn't resolve #1538 completely. See here.

Is there a way to use your fork before publish?

@mirismaili, thank you for publishing this package! As s temporary solution, I've just installed a patched package from GitHub branch like this:

  "devDependencies": {
    "openapi-typescript-codegen": "github:eakorolev/openapi-typescript-codegen#feat/config-overrides"
  }