Since your wife has been diagnosed with NAFLD and She had undergone gall bladder
So, the only way to prevent dyspesia is avoidance of fatty food and oil.
I know you already know this, but like all doctors I am saying the same because that is the only way out.
She can continue on Udiliv
as it has shown to be beneficial in NAFLD.
She can also take Pantoprazole
and domperidome combination if dyspesia is lot troubling.
Other thing is that you should be aware of the fact that NAFLD can progress to liver cirrhosis
I am not saying that It always progress, but it can.
So, its always advised to be in regular follow up with your doctor.