Can I Query the Number and Size of Files in a Folder?

Take Linux OS as an example. Run the ./obsutil ls obs://bucket-test/test/ -du -limit=0 command to query the size of the test folder in bucket bucket-test.
./obsutil ls obs://bucket-test/test/ -du -limit=0

Start at 2023-03-16 06:40:18.2773873 +0000 UTC

Listing objects .

Remove the -du parameter to view more information
[DU] Total prefix [test/] size: 990.85MB