When creating a Multiple Choice question on a hosted feature layer, it works as expected.
However, when configuring the form on a hosted feature layer view, the field is automatically converted to a Text Input. The Multiple Choice option is no longer available, and there is no way to change the input type back in the Field Maps form designer.
This is a major limitation because many organisations use hosted feature layer views to manage editing permissions and provide different forms for different staff groups. As layer views are Esri's recommended approach for access control, this effectively prevents us from using the new feature in production.