By design gpgtar does not extract symbolic links and other non-regular files. gpgtar does now emit a status message to inform callers about the number of skipped files (see rG56b65f33d261: gpgtar: Print a result status with skiupped files.). Kleopatra should inform the user if some files were not extracted, so that they can decide to use another tool for extracting the archive.
We could also offer to save the decrypted archive to disk, so that the users can actually extract it. Otherwise, they'd have to change a setting in Kleopatra to prevent Kleopatra from automatically extracting the archive.