I am not able to add button to inline list, now it is only (+) I want it to be a named button , and I am not able to create a normal list, by default it’s becoming inline list, and I am not able to add any other components in the tab where inline list is present
That looks like a Classic App. Are you looking for features that are only in New Apps?
Also, in Classic Apps, List style layouts can only contain an an inline list and nothing else. You need to use a Detail style layout if you want to add additional components. However, in New Apps, all screens are Detail style layouts.