Based on how Xamarin performed prior to the MS acquisition, I'd guess dead.

The license cost was high, and the MS acquisition came right around the time React Native and Flutter started to enter v1. I think they'd of been blown out of the water pretty quickly. At least Microsoft allowed Xamarin to get into enterprise .NET shops pretty quickly. There's a lot of B2B form based apps written in Xamarin. I worked on a pretty big one that made (and continues to make) a lot of money.

I've long assumed the point of the acquisition was because Xamarin did basically all the hard work of allowing .NET to be cross platform.