GitHub API supports creating internal repository when use GitHub Enterprise Cloud version. However, githubkit doesn't support it due to parameter checking when to create a repository. See:

githubkit/versions/v2022_11_28/types/group_0854.py
class OrgsOrgReposPostBodyType(TypedDict):
"""OrgsOrgReposPostBody"""

name: str
description: NotRequired[str]
homepage: NotRequired[str]
private: NotRequired[bool]
visibility: NotRequired[Literal[**"public", "private"**]]
has_issues: NotRequired[bool]
has_projects: NotRequired[bool]