Hello @dhopkins,
Welcome to the Community. Let me share some clarification about the Performance center section in QuickBooks Online Accountant.
I appreciate your input about being able to view the A/R graph tile in QuickBooks using the theme. Currently, an option or ability to include this portion in dark mode is unavailable.
As we assess this, I suggest you visit our QuickBooks Blog to stay updated with all the changes that are being made.
Also, I've attached an article you can use to learn more about the charts in QuickBooks: Create charts to see your business performance.
Drop me a comment below if you have any other questions. I'll be more than happy to help. Wishing you a good one.