Engagement Program not visible in RCA Program Membership Analysis

Hello,

I am trying to look at a membership analysis in RCA for a program, which happens to be an engagement program. However, I do not see it in the list, are engagement programs not available for "Program Membership Analysis" in RCA?

To be clear, I am not looking to analyze streams, just number of members added/changed by month. I can analyze other (non-engagement) programs in RCA regardless of analytics behavior or period cost.

Would appreciate any insight whether this is a Marketo limitation. If not available in RCA, is there other way to get such report? The membership view on program properties shows some of this information, but not monthly trend and I cannot subscribe to it.