In MUX on hierarchies, non-labor costs are not available to show on cards or to roll up for totals.
This is a current limitation.
Release : 16.0.1
Component : Clarity MUX UI Usability
You can make a custom calculated attribute on the Project Object or Investment Object that will aggregate Total Actual Costs (from transactions)
As the Expression
Complete building the calculated attribute.
Make sure you assign it an API Alias so you can use it in MUX.
Then you can add this attribute to your projects in the hierarchy cards.
Refer to article
Note that the article shows adding the attribute to the Project Object, but the same steps are available for the Investment Object which may be more beneficial to using Hierarchies.