What's left to talk about?

When you match with a girl on a dating app, once you've asked her all the usual stuff, eg. What do you do for work? Where do you live? How many siblings do you have? What do you like to do in your spare time? What kind of music do you like? Honestly what are you meant to ask after that because I find like 90% of the time the guy is keeping the conversation going and eventually I run out of steam. Most girls ask me no questions at all, apart from "you?" responses to questions I've asked them.