Bitcoin Core has not automatically created a wallet on startup for several versions now. You must explicitly choose to create a wallet by using either the createwallet RPC or through the GUI with the "Create Wallet" menu option or the button that appears when no wallets are loaded.
Yes, absolutely, because by doing this, we will be able to work on it according to their style and their method, and whatever money we have will also come out easily, and that is why we do not have a clear view of this yet, and many people do not even consider Bitcoin better than this. But this whole method is a safe one that keeps our money and Bitcoin safe.