Reading more carefully: their suggestion is to use a containerized 18.04 environment (snaps) to run Wine on a 19.10 system. This would use the 18.04 packages. But since there's no expectation of long term support for the environment containing 32-bit packages, I can't see any point in putting much effort into this temporary solution.
Nor do I see much point in packaging a 64-bit-only Wine on our end. It's such a niche case for 64-bit-only Wine to be useful at all. If those few people for whom it's useful need the latest development version, they can build it themselves.