I made a post about it months ago after my neurologist brought it up to me. It is recently FDA approved. It has jumped thru all the hoops. My neurologist brought it up to me recently as an alternative to the Hizentra SCIG I have been on weekly for 3 years. I have not “tried” the new Vyvgart as yet as I am waiting to hear from others experiences.
The FDA approval:
https://www.fda.gov/drugs/news-events-human-drugs/fda-approves-treatment-chronic-inflammatory-demyelinating-polyneuropathy-cidp-adults