For those interested, you can see the World Values Survey Questionnaire here: https://www.worldvaluessurvey.org/WVSDocumentationWV7.jsp

(For Wave 7 (2017-2022), which the paper used)

Some of the questions don't really make sense to ask an LLM (being about the survey taker's personal financial situation and such), but the paper doesn't seem to go into detail of what questions were used.