When I use listaddressgroupings it just returns [
]
You don't see any address, because listaddressgroupings only shows used addresses.
Also, your wallet is not synced. Even if an address has been used, bitcoin core is not aware of that.
Use the command below to see all your addresses (used and unused ones).
listreceivedbyaddress 0 true
Note that, you can see list of all your generated addresses using the GUI too.
To do so, click on "Window" and then select "Receiving addresses".