As of now, a user cannot extend the expiration date of a listing before the post itself expires. It’s not always feasible to renew or relist an expired listing immediately after it expires, so there’s always a possibility that the listing will remain offline for a few hours.

Our client wants to keep their listing online at all times.

Is there any way to achieve that?

Extending the expiration date by a week or two, or even three days, before the post expires could be a beneficial feature.