• Re-export native submodules of cv2 package level.
• Re-export manually registered symbols like cv2.mat_wrapper.Mat

__init__.pyi file import section after patch

# other imports 

# --- Added section ---
from cv2 import Error as Error
from cv2 import aruco as aruco
from cv2 import cuda as cuda
from cv2 import detail as detail
from cv2 import dnn as dnn
from cv2 import fisheye as fisheye
from cv2 import flann as flann
from cv2 import gapi as gapi
from cv2 import ipp as ipp
from cv2 import ml as ml
from cv2 import ocl as ocl
from cv2 import ogl as ogl
from cv2 import parallel as parallel
from cv2 import samples as samples
from cv2 import segmentation as segmentation
from cv2 import utils as utils
from cv2 import videoio_registry as videoio_registry
from cv2.mat_wrapper import Mat as Mat
# --- Added section ---

# Rest of the file is unchanged

Resolves: #23777

Pull Request Readiness Checklist

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

• I agree to contribute to the project under Apache 2 License.
• To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
• The PR is proposed to the proper branch
• There is a reference to the original bug report and related work
• There is accuracy test, performance test and test data in opencv_extra repository, if applicable
  Patch to opencv_extra has the same branch name.
• The feature is well documented and sample code can be built with the project CMake