Hi Farhan,
As of this time, integrating Point-of-Sale with QuickBooks Online (QBO) International version isn't possible. The closest alternative that you can consider is to search for one online that works well with your business. Let me provide you insights on how to go about this.
I know how you want the syncing to work easier for your business inventory. But if you have questions about the integration, I suggest contacting your POS provider so they can give you a step-by-step process on how their solution works.
You can also check this link in case you have other questions about QBO: Money In, Money Out.
Leave a comment below if you need anything else. I'll make sure to get back.
