I doubt Air strikes doing anything significant when it comes to knocking out Hamas's warfighting capabilities.
A long brutal ground assault like bakhmut is needed.
It will come. There are plenty of videos already circulating of Hamas infrastructure being bombed. Contrary to what many of the deeply partisan (in favour of Palestine / Hamas) posters in this thread are spewing (I'm not including you in that group), Israel isn't simply carpet bombing the city and destroying civilian infrastructure and massacreing civilians for the fun on it. While their intelligence failed in stopping this Hamas attack, they have excellent surveillance over Gaza and they know about a lot of locations that Hamas uses, politically / militarily. For example, they completely destroyed the Islamic University in Gaza because it's well known to be a place that Hamas uses as a weapons cache.
Also, in order to limit their casualties, I hope the Israelis aren't foolish enough to embark on an urban combat campaign in any large capacity, when they can simply advance slowly, and destroy Hamas strongholds in the city with airstrikes and long range artillery. Yes, that increases civilian casualties, but if it decreases the casualties that your civilians are going to face, it seems worth it. As for the underground infrastructure, that one is interesting. Sometimes you can get away with simply collapsing buildings on top of it and starving out the trapped Hamas members stuck under ground. Alternatively, if they have multiple underground exists blocked, you can funnel them to chokepoints, that you can use gunships and drones to monitor, and simply pick them off as they surface.
Above all else, you have to ensure that you have to implement a tight military blockade of the exit towards Egypt. Yes, the Egyptians have technically closed it right now, but terrorist organizations find ways to bribe people and get their people out. Israel needs to put clamps on the area, in all directions, by sea, land and air, so they can systematically exterminate Hamas members that are trapped.