Not good news. So I'm coming from a Florida perspective. The general wisdom here in the past has been native milkweed in the garden is important for the monarch.
After working at native plant nurseries, and now for the local government doing environmental work, I've seen the narrative shifting to no milkweed.
Basically, disease has become a big issue in our South Eastern monarch populations, and it turns out that gardens have become hotspots for it. Here is an article on the subject.
I personally stopped recommending Milkweed of any kind to people years ago after seeing the effect of disease in the nursery I worked it.
Unfortunately, I do not know. If you find anything out, I'd like to hear about it.