I'd like to share some insights about the reason behind the amount difference that's showing on your Trial Balance and Supplier Balance Detail report.
You'll need to double-check if you have foreign suppliers as they are reported separately in the Trial Balance and can be seen on the Supplier BalanceDetail report. This can be the cause of why you're noticing different amounts.
On the other hand, you also have to make sure that the accounting method of your Trial balance is correct. As they may affect the figures that showing up on the report.
I'm also adding here a link that provides details about the disagreement of the Balance Sheet and Accounts Payable Ageing report so you'll be guided on why these reports may result in some deferences on your future transactions. The Targets vs. Sources article attached explains how the system gets the source of the transaction and where they're going to be posted: