I got an answer to the third question on problem-solution fit, but not to the first two questions, i.e. ~

1. What are the alternative solutions (can be dev coding it themselves) and what do they lack in and how much more value (approx. time saved in coding this functionality as a percentage of time taken to code the rest of the app) does your offering create in comparison to the alternative ?

2. How often do your users face the pain-point (i.e. how often do they need to create a different type of survey) ?