@Cameron Lee Brown Through working previously as a credit analyst, I've reviewed quite a few PFS. Typically the Lender you're working with will provide you with a straightforward form that lists the broad areas (e.g., Personal Info, Employment, Income, Assets, Liabilities, etc). This should provide them a high level financial position of the borrower. You definitely want to provide all forms of income and expenses, but don't have to get as granular as detailing specific expenses like gas/groceries. In regard to the income detail, you will typically see this broken out between the various forms of income (e.g., W2, Business Distributions, Rental Income, Interest & Dividends, etc.).
You should be able to do a simple google search on Personal Financial Statements, and see the standard format. I personally just created a PFS file in excel that I track/update monthly so that I always have a fairly up to date one on hand - Also just a good way to track net worth MoM.