counterpart, copy it with the _py310 label.
    """
    docs_src_path = Path("docs_src")
    # Handle directory-level labels (e.g. app_b_an_py39/)
    for dir_path in sorted(docs_src_path.rglob("*_py39")):
        if not dir_path.is_dir():
            continue
        py310_dir = dir_path.parent / dir_path.name.replace("_py39", "_py310")
        if py310_dir.exists():