Hello Sainath,
Typiacally the packager should create this during the packaging process. There is no explicit option on the packaging interface (wizard otherwise) to create this folder.
Only possible reson I could think of for the missing source folder is that the application has no installable files that went to source drive (default: C_Drive). It is possible that application wrote the files to some other location that the packager is unable to detect.
What packages have you packaged that doesn't have this source folder? The issue you might surface while streaming is that the package won't stream or may be won't upload.
I can try packaging the same app as snapshot and post the results. Please include the composer version as well
Regards,
Bala