We have added a new attribute to the cost plan object. This attribute needs to be secured in the modern UX. We have added a rest API Key and I can see it in the grid views.
The attribute does not appear under the administration \ attributes screen though
The same applies to the benefit plan and benefit plan details objects
As 16.1.0 financial plans are FLS enabled.
The Administration – Attributes page provides access to Financial (Cost/Budget and Benefit) Plan objects. You have the following capabilities while using Field Level Security(FLS) with Financial Plans
It is targeted to include Cost/Budget Details and Benefit Plan Details object in 16.1.1