I can share some information with the report that you're trying to generate, @the_lightowlers-.
Currently, QuickBooks has two decimal places set by default, and changing it to four decimal places is currently unavailable. The ability to format your budget reports to 4 decimal places would be a great addition to the current features that we have, so I'll take note of it.
I'd also recommend you visiting our Blog to learn what new updates and features we have.
Feel free to read this article for more information on budgets: Create and import budgets into QuickBooks Online.
In case you have other concerns about budgeting and financial reports in QBO, don't hesitate to leave a comment below. I'm just around to help. Take care and stay safe always.