Thank you for posting here in the Community, @azma-syed.
I'll share with you the three options to run a report that will show the total balances only in QuickBooks Online.
Getting the total balances in a report depends on the information you need. If you want to get the total balance of each account, simply run the Balance Sheet Summary. In the Display columns by drop-down, choose Total Only and hit Run report.
See the sample screenshot below.
For the total balances of each customer, you can access the Customer Balance Summary report. And for the supplier's balance, run the Supplier Balance Summary report.
Please browse through this article: Run reports. You'll find steps on how to set up general report preferences, print, email, and export them.