With questions like these it's hard to be excited
I mean anything fun, for instance if BTS or BP go to one of these interviews and get asked "how many members" can you imagine their faces lol.
You can have questions about the members, what they do, hobbies/interests outside music, dorm stories, fun memories etc. Have them react to fanmade content maybe as well, anyway I know it's the format but I can't imagine the members feel too excited having to answer these lol, but they endure it poor girls

I guess with this format you can only do so much, but they'll probably have some other content too where they'll be asked different stuff hopefully.