Is adding checkboxes to a cart drawer possible on Dawn theme?

We currently have a modified Dawn theme with cart drawer. We’d like to add checkboxes to indicate whether the purchase is a gift, self-gift etc. The only place it makes sense to do this for the whole order is the cart drawer. However, this throws an error and I’m not sure the checkbox response is being recorded.

This guide states Note: Cart attributes can be added only to a cart page, and are not compatible with cart drawers, or cart popups: https://community.shopify.com/post/625858

Is there any way around this? Is this possible on Shopify Plus? I’d rather not resort to apps.

Thanks!

I’ve seen examples of checkboxes in cart drawers working on at least one Shopify site - although I do know they were a Shopify Plus user, if that makes any difference?