@P.A.U.L. you can synch lists or cards between boards using the Unito power up. You can do this in a sort of limited way also with Butler but it will really eat into your quota. You can also see all cards you've been added to across all boards using the "Cards" view, and I also created an integration that creates linked cards in a central board for any card you're added to or when you're mentioned in a comment:
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