Welcome @concordia196337, The VA does have some information on the topic that might be helpful if you haven't already seen it.

--- VA Disability Rating for Agent Orange and Ischemic Heart Disease: https://veteransguide.org/toxic-exposure/agent-orange/ischemic-heart-disease/

There are also other veteran members who have posted their experience with agent orange in other discussions. Here is a search results link to the different discussions and comments along with the search keyword:
--- Agent Orange - https://connect.mayoclinic.org/search/discussions/?search=agent%20orange
--- NASH - https://connect.mayoclinic.org/search/discussions/?search=NASH
--- AFib - https://connect.mayoclinic.org/search/discussions/?search=Afib

Have you been diagnosed with AFib along with NASH?