We can understand out import feature may not have all fields desired or reports suitable to your exact needs, we are always looking at ways to improve QuickBooks Online through customer feedback which you can submit here.
Oh, for sure I have a growing list of QBO's half-arsednesses :-), but so far I haven't bumped into that particular problem of lack of aging info.
What is it about the Accounts receivable aging summary and Accounts payable aging summary reports that don't provide what you're looking for? Is it that they're not "in detail"? I rarely use the "...detail" version of those reports but now you raise the matter, yeah I see that those group by aging period, but not then further by Supplier or Customer. Bummer.
You're probably already doing it, but my only suggestion would be -- and this I do turn to a lot -- to spit the report out into Excel and then you can do whatever you like with it. Shouldn't be too hard to get that further by-Supplier grouping if that's the issue.
Thanks for joining this thread, @ThomasK.
We are keen to customer ideas especially when enhancing product features. Please know your voice is important to us, and we take this feedback as an opportunity to guide us on which area of the product we need to improve on.
I’ll send this suggestion on your behalf for consideration in future product updates. In the meantime, you can continue exporting both reports to Excel and customize it from there.
We send out newsletters each month to keep our customers updated with what’s new about the application, and you’ll also get some tips on how to manage the business using QBO. You can visit this page to sign up: QBO Blog.
If there’s anything else that I can you find in QBO, post a comment below. I’m more than happy to assist further.