She's not super old. Her comb looks about big enough for laying age. It could be the stress of moving has stopped her laying for a little while, or it might be that she's hiding her eggs somewhere you haven't noticed? Have you seen her going in to the nest box area at all?
Also, her hip bones will be wider if she's laying. Before a hen starts laying they're about 1 finger width apart, after she starts laying they'll be wider set. I haven't checked mine in a while, but I think it's almost 2 fingers wide after they are laying.
Their hip bones are located just below the cloaca, in the squishy tummy area.
here's a good BYC article with pics
https://www.backyardchickens.com/articles/who-is-laying-and-who-is-not-butt-check.73309/