How to get Gutenberg pattern sync status for custom pattern listings table?

I think the answer is easy: if the block does not have an ‘unsynced’ post meta associate with it, this means that is a synced pattern.
Look at the format of the json file of two exported patterns, a synced and a non synced and you will see the same: a non synced has this property: “syncStatus”: “unsynced” and a synced one has this other property: “syncStatus”: “”

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