Bunny ears aren’t a problem! The resulting knot is the same as a standard shoelace knot. If your shoes are coming untied a lot, you probably are tying granny instead of square. Make sure that if you cross one way on the base crossing (like left over right), you cross the other way for the bunny ears step (like right over left). All the info in the link applies to bunny ears.
Curious how this will interact with RCS. Hopefully it will at least get Apple to natively support an interoperable rich format