I registered a model in my AML workspace, and I can see it in the Model List:
But I cannot see it in Designer (preview), which prevents me from using the new model there.
Looks like a bug to me. Datasets work fine.
This is known issue as the models registered in workspace cannot be consumed in Designer without the new custom module capability (in private preview) available.
The models showing up in Designer today are these generated from Designer training -> inference pipeline conversion and can only be used in Designer (not registered in the workspace). We have an effort ongoing to reduce the confusion.