If you are creating a table view, then there is no way to do a select. It just shows you all your records in a different format.

I don't see a way to filter Cards.

There isn't a way to filter directly but you can use Readable if. You will need a new table (page) to hold a field to turn the filter on and off and then in Readable if put code like this

let a := first(select Settings).FilterField;
if a then SpecificField else true end

Be aware that Readable if is a global setting. Every portion of your application for every user will be affected by this, not just your card view.

Regards John