How to add toggle in format pane dynamically

Hi, I'm developing a custom visual, where I want to show multiple toggle in formatpane based on user input(data field),
ie; if data field have one colum only one toggle should be shown, if another column is addeed new toggle will added for that.

I'm able to partially achive this by modifying enumerateObjectInstances() function

for (let i = 0; i < 5; i++) {

              objectEnumeration.push({

                objectName: objectName,

                displayName: "sample"+i,

                selector: null,

                properties: {

                    firstProp: this.settings.myObj.firstProp,

                },

              });

}

which give something like this

 

the problem is, if I change the first toggle the rest of toggle also chaning, I'm not sure how a I should save it to settings.