RS19 compatibility with Victron Microgrid

I don’t see the RS19 (or Multi RS Solar) listed as compatible devices for the Victron Microgrid (1. Introduction)

Is there a plan for either the RS19 or Multi RS Solar to be compatible with the Microgrid topology?

Hi, we don’t typically get access to that information. It is rarely announced or discussed here.
Keep an eye on the professional site news and trade shows.
You can also drop an email to your regional manager, maybe they can advise.
See the contact us page on the main Victron site.