You can use a "Single radio button" form component and "Text field" form component and put them into a "Horizontal group".
In the configuration of the "Single radio button" form component, select the "Coupled form component" tabs and select the text field form component. Then the text field will only be enabled is the radio button is selected.
Then, repeat this for each value of the radio button group and make sure that all "Single radio button" form components have the same value in their "Variable name" properties.