Yes, you can set "Disable Server Change" in the server attributes.
For additional context, the lock icon will always be there for first time use on the standard Traccar Manager app. You need to deploy your own customised app to have it pre-configured so that a raw fresh install will connect to a predetermined server.
The "disable server change" setting removes the icon from the standard Traccar Manager app only after you have connected at least once.
the lock icon will always be there for first time use on the standard Traccar Manager app
This is incorrect. You will be presented with a screen where you need to select the server the first time you open, but there won't be any lock if it's disabled on your server.
Hello at the mobile app there is a lock when you login to the server, which can select a list of default services.
i found at the source code src/login/ChangeServerPage.jsx the list.
is it possible to disable it?