Aside from the fact that Iran is more than capable of expanding and redesigning these tunnels, in many of these cases it really doesn't matter if the U.S. has blue prints of them or not! What matters is the payload requirement necessary to damage these facilities in any meaningful way.
For example If a minimum of 6,000 lb is required to simply scratch the surface of such facilities that limits the type of platforms, range, speed, maneuverability & the number of ordnances each platform can carry which in turn increases the number of weapon systems and Air Defense sites and equipment you would need to take out and or engage to create safe passage to and from such facilities meaning not only do the routs have to be safe but the location of which these Aircraft go back and land would also have to be secure and due to Iran's size and the number of these facilities it becomes rather complicated and costly task to accomplish and get away with and unless your successful in severely degrading Iran's retaliatory capabilities you would then be forced to defend against the hell Iran's going to bring to you and your allies.
Now does the U.S. have the capability to carry out such an attack? Yes with B-2 Bombers they absolutely do!
However would such an attack be sufficient enough to degrade Iran's capabilities to a point that they can get away with it with little to no consequence when it becomes Iran's turn to respond? in my opinion NO!
If the Saudi's couldn't stop Yemen that's a relatively small & financially pour country right off their own boarder from firing Missiles at them the idea that the U.S. would be able to prevent an Iranian retaliation is nothing but a delusion.
