Business Analyst required to review some data and create a repor

I have two datasets, both around 175k rows of data (not many columns). They relate to a process for an online financial services company to do an online identity check (called KYC - "Know Your Customer"). The details of the process is written in some API documentation which I will provide.

The process is that a customer submits a government-issued photo ID (e.g. driving licence) and a picture of themselves which goes via an API to a verification partner. The partner then does 2 checks:

• Document check: To verify that the photo ID is valid and authentic;
• Facial Similarity check: To verify that the face in the picture is the same with that on the submitted ID.

The customer will ‘passes’ the process if the results of both Document and Facial Similarity checks are ‘clear’. If the result of any check is not ‘clear’, the customer has to submit all the photos again.

The “pass rate” is defined as the number of customers who pass both the KYC process divided by the number of customers who attempt the process. Each customer has up to 2 attempts.

The pass rate has decreased substantially in the recent period.

What I need is for someone to analyse the data in conjunction with the API documentation, and write a brief report that outlines the root causes and solutions, alongside the analysis of the data. It shouldn't take more than an hour or two for someone confident in data and API documentation.