Any custom attributes created on either objects: To Do , Investments, does not appear in the filter list of the Smartlists available under My Workspace in the modern UX
STEPS TO REPRODUCE:
Expected Results :-
The custom attribute should be available in the filter list
Actual Results :-
The custom attribute are not shown in the filter list
All supported Clarity releases
At present the Smartlist and the rest api that powers this specific view does not include custom attribute data at this time
As a workaround, if there is a need to filter based on custom attributes, the respective custom attributes could be used either in the ToDos workspace or in respective To Dos module, which can be made available under Projects and Tasks