You got a good point. That's true, you can only change the settings of a connection that you are already connected to. The only way to change these settings of a connection that you are not connected to is using command-line tools as you can see in the link below
https://www.windowscentral.com/how-manage-wirel...
But this can take a lot of work and can be confusing, so, another option is to use a third-party tool to manage these settings, like this one in the link below
https://www.netsetman.com/en/freeware
Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.