1. Static dependent lookups are not available to configure in the new UI.
Here's the link to the documentation referencing this as well a as a few other limitation with the new UI studio functionalities:
https://docops.ca.com/ca-ppm/15-4-1/en/using/getting-started-with-the-ca-ppm-new-user-experience/new-user-experience-compare-with-classic-ca-ppm/#NewUserExperience:ComparewithClassicCAPPM-SystemAdministrator
Under "System Administrator", Capability "Studio" it says:
"The following Studio functionality is not available in the New User Experience:
Custom objects, subobjects, and attributes (except custom attributes for the Project and Investment objects that are available through blueprints)
Display mapping outside of project status reports and project details:
The status colors on the project status reports and the project tiles (for example, green for On Track or red for At Risk) are based on the display mapping configuration for the Overall Status attribute of the Status Report object.
If the project blueprint includes attributes that have display mappings set up in Classic CA PPM, then stoplights with hover text appear for those attributes in the project details. Display mapping is not available for boolean attribute types.
See CA Clarity PPM Studio Objects and Attributes for details on configuring display mappings for attributes.
Secure subpages and display conditions
Object actions
Any Studio view level settings such as Required, Enter Once, or Hidden
Parameterized and Static Dependent List lookups"
2. Parameterized lookup attributes are not supported, so while this attribute may show as available on the Blueprint list, it won't show any values in the New UX. See KB000095938:
In the New UX Parameterized Lookups show no values
Document ID : KB000095938
https://comm.support.ca.com/kb/in-the-new-ux-parameterized-lookups-show-no-values/kb000095938
Also, please review the following KB:
In the New UX, Some Attributes Cannot Be Added To Projects
Document ID : KB000073215
https://comm.support.ca.com/kb/in-the-new-ux-some-attributes-cannot-be-added-to-projects/kb000073215