Is it possible to create a question where you can choose from a list, or if no suitable answer is available, enter the answer yourself in a extra field and then select it?
Welcome to the community! You could create your survey form (with other option) as outlined in the support article here.
Additionally, you could also have a look at the community forum that has happened in the past here.
Have a great day!
Not so sure that this answers their question. I am referencing
The answer would be no this is not possible. You cannot add a response and then have it looped back to be a choice response. What we have is the ability to add other option as highlighted as in the support article here .