Function PyLong_FromUnsignedNativeBytes 

pub unsafe extern "C" fn PyLong_FromUnsignedNativeBytes(
    buffer: *const c_void,
    n_bytes: size_t,
    flags: c_int,
) -> *mut PyObject

Available on Py_3_14, or Py_3_13 and non-Py_LIMITED_API only.