Unreasonable to be dropped suddenly by an agency?
Again, realism here. If you're employed in a dance company for example and your weight shifts more than it was when you were employed, you might get a warning and a deadline for getting it back to an agreed point. But transitioning is totally different isn't it?
This is a model who chose to radically change their appearance and the kind of jobs they wished to work on. Good luck to them, I hope they find those jobs. But it seems clear that this is radically different to the appearance and jobs that this agency had taken them on to market, and could supply to them.
I'm not sure whether this is a problem understanding the realities of working for a living in these fields, or a problem that the agency didn't put other interests and considerations aside and focus on the trans person's positive experience? When someone buys a model's time and work from an agency it's to create a sold product. It's not about the experience and wishes of the model.