Smush Pro CDN not working as expected.

I have activated Smush Pro CDN and configure but Serve scaled images still remain and that should be covered by CDN but it is not.

https://monosnap.com/file/oy8acHUjWIOVlPzcBhAMeCxu2WK73P

For some reasons, those images are not serving from smush CDN. Please check and help.