Encountered Issues with Payments API

I made a post yesterday due to having an issue with authorizations and the Payments API that turned into a 403 status code instead of a 401 and just wanted to make a more proper post addressing now my full set of issues in hopes of bringing it to someone's attention regarding these problems and possibly getting the help I need. These issues are hindering my progress to developing an app to assist in reconciliation for our financial team.

Fees Missing from Transactions (Docs link)

While the fields I found relating to fees are not marked required, the application fee field will not return on any of my calls for the Transaction API even though I can see fees inside of the web view. This fee value is not present in the other fields relating to fees, too. Thus, I have no way to find the net amounts for gifts. I can easily match and pull other data I need with the Transaction IDs I have, so it isn't my creds or IDs being wrong. I just can't get the main things I am looking for from this specific call: fees. Otherwise, this is no better than just looking at the gift from an RE gift list API call.

403 on Disbursement List (PREVIEW) (Docs link)

I understand that being in preview the call just may not be available to us yet, but I need some sort of way to work around this or updates on how this feature is developing as I am needing to find disbursement dates for my app. This too can be found in the web view but is inaccessible to my app.