You can view the vendor credits in the A/P Aging report in QuickBooks Online, pclaessen-baxtec. Let me guide you through the process.
When running the A/P Aging Detail Report, please review the correct report period to display the transactions during the time covered. This way, you can see the Vendor Credit or Supplier Credit under the Transaction Type column. I'll share a snippet below:

However, if the entries are missing on the report, let's log into your account through an incognito or private window. This mode doesn't retain cache to verify if it's a webpage issue. Here are the keyboard shortcuts you can use:
- For Firefox, press Ctrl + Shift + P
- For Chrome, press Ctrl + Shift + N
- For Safari, hold down Command + Shift + N
If it works, clear the browser's cache to start with a clean slate. Alternatively, you can also consider utilizing other supported browsers.
Additionally, refer to this article for more ways to record credits for your vendors: Enter supplier credits and refunds in QuickBooks Online.
Furthermore, save a customized report in QuickBooks Online so you don't have to make the same personalization and share it with other users.
Post your concerns about vendor credits below. Let me know if you also need assistance tailoring or preserving a report. I'll be here to provide more resources.