The feature to transfer inventory items from one location to another is still unavailable in QuickBooks Online. I can see some other users posting about this option, so I’ll be sure to take note of it. It will make QuickBooks Online (QBO) more convenient to use.
For now, I suggest you to check the following articles to know more about the current features that we have in managing your inventory:
I'll be right here if you need more help. Keep safe and have a wonderful day!