Does it have to be a text input feed? Or is the use case to display the output of the script somewhere in your app? If it's merely about displaying the value, I would consider using the text or html component and dynamically inject the output of the script.

The result will show the value of script output with key 'input' inside the component after clicking 'button 1':

Inserting it in the text feed is currently not possible, but you could use the script output feed everywhere where the text feed could be used, so if it's not to display the output value, you could directly consume the output and skip the text feed.