You can, simply add the UPROPERTY meta “Multiline=true” UPROPERTY(meta=(MultiLine=true)) to your C++ FText variable declaration for the Data Table Row.
See: All UPROPERTY Specifiers · ben🌱ui
As for the format trick, you just need to set it up like the screenshot EricWack posted where you plug your data table’s FText variable into the “Format” pin, and then click on the Format Text node and hit “Add Pin” to add whatever { } modification you want. For example a pin called {/n}.