Edit Column(s) block with HTML

The result I’m after:
Have an entire column (styled as a card) be clickable.

The problems I’m encountering:
1) No way of adding a link to the entire card (column) using the blocks editor.
2) Unlike other block editor elements, there is no option to edit the columns block via HTML (in which I could manually add the relevant a tags myself).

Have I missed something? Or is adding a link to an entire column like this not possible in the vanilla WP blocks editor?

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