Hello Echobiv, welcome to the Microsoft community, I'll be happy to help you today;
I understand that you want to disable automatic WI-FI connection in Windows 11;
Initially I suggest you try the following;
Access the Control Panel;
Click on Network and Internet;
Click on Network and sharing center;
Click Change adapter settings in the left pane;
Double-click on the Wi-Fi connection you are currently using;
Click Wireless Properties;
On the Connection tab, uncheck "Automatically connect when this network is in range" click OK;
Make sure the computer still automatically connects to WiFi when starting;
I hope I have helped, see you soon!