There used to be an option on the right hand side of cards to Copy but this seems to have disappeared from my options.
It's not expected for the "Copy" button to no longer be visible. Could you please share a screenshot of what you're seeing on the card back?
I"m not sure if this is an update being rolled out but for me it still is visible under actions:
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I also see it in both the Beta and not beta versions of Trello
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