Please refer to the the Trello connector documentation for reference, specifically the Actions and Definitions sections. Those are your limitations of usage with the Trello connector and Power Automate. The Get a card by ID action and its many parameters may be of some use.
If there is functionality you would like to see added to Flow, a Flow Connector, or a Flow Template, please consider submitting it to the Flow Ideas page, where it can be voted on by other users, and tracked and commented on by the Flow team.
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