You are trying to Assign Page Layouts to Business Roles based on values in an Extension Field of type Multivalued List
SAP Cloud for Customer
Reproducing the Issue
1. Login to System.
2. Navigate to required screen ( eg: Opportunities screen ).
3. Create an Extension Field of type Multivalued List ( eg: Create Extension Field on Opportunity header).
4. Go to Assign Page Layout screen.
5. Select required Business Object (eg: Opportunities ).
6. Open the list of Instance Types.
7. You are not able to find the Extension Field that you have created.
This is expected behavior. This functionality is not supported for Extension fields of type Multivalued List.
Instance Types for Assign Page Layouts screen is based upon Extension Fields of type List only.
Assign Page Layouts, Multivalued List assign page layout, Multi Value List , KBA , AP-RC-UIF-FLX , Page Layout & Key User Configuration , Problem