Oil leak is hiding behind another part and hidden by belt splatter?

The van listed above is a Grand Caravan, with dual capability shifting and I have the one with the flex fuel option of e85 or gasoline.
The problem that I am having is this leak is seeping out from high up in the upper engine location, but the leak has to be behind another part and can be hidden well. My downfall after cleaning off my engine using an engine degreasing spray that I purchased at my local auto parts store. I started the engine hoping to see where the root of the leak was only to have had the oil hit the serpentine belt and it splattered oil everywhere now. So, there isn't one place to look for fresh leaking, now everything was covered in the stuff again. I have replaced many parts on this van in the hopes of finding this leak eventually. This van was my mother's van. My mother passed away in 2019. I want to keep her van in good running condition any way I can. I can't see myself ever scrapping her out and getting another vehicle just yet. However, I am limited on funds right now, so I need your knowledge and experience. I need some sort of help. My husband and I are going to be splitting up, so he refuses to help me in any way anymore. So maybe this sounds like a problem that you have seen in all your years dealing with Dodge vans, and maybe remember what possible part that the case needed and tell me what it was. Then I can start looking to get one. That is if I haven't replaced it already recently. If it isn't, then I will find a way to get the correct part and get it changed out for a good one myself. Then her van will be running once again. Her van is very important to me, and I want to make sure I repair it properly. Any other advice about keeping the van at its peak performance would be greatly appreciated as well. I will check back here often to see If I got a reply. Thanks in advance for any knowledge you could bestow to me.