Once I’ve claimed the song I can only see the Sync shares, while both Mech and Perf are not populated. Is this correct?

Yes. 

As Musixmatch manages and pays royalties for sync rights, the Publisher Studio is set up to only show sync shares. 

If you wish to add the mechanical and performance shares you will need to send the info via a standard file such as CSV or CWR. 

Please get in touch with publisher-support@musixmatch.com

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