I'm on the Pro plan, but I can't select Firefly 4 Ultra

I've updated Photoshop to the latest version and I also downloaded the Beta version with experimental features.

In both apps, I can't select Firefly 4 Ultra. I can only select Firefly 3 at most.

I generated an image in Firefly selecting Firefly 4 Ultra and I want to make additions without changing the model to 3, which I'm concerned might cause inconsistencies.

I don't see the point in using Nano Banana for edits, as then I would lose the entire benefit of Firefly, which is the commercially safe aspect.

What can I do?