Go back to editing the POS Location, select the East Rand stock which you’ve created in the third step.
...
This open source POS version only supports Default Stock. It means all locations (that link with the POS you created) can only link to one default stock. All your stores using POS will share the same inventory in one warehouse.
To use multiple stock for different warehouses and stores (omnichannel solution), please upgrade to our Commerce plan.
...
Save the POS Location information. The POS machines in that Location will display all items in the East RandDefault stock.