I was thinking specifically of the GBU-57A/B Massive Ordnance Penetrator.
30,000 pounds, and each B-2 can carry 2. One to dig a deep hole, the second to deliver the deeper hit and destructive shockwave/overpressure.
And for the secondary targets, there’s more B-2s behind the first ;-)
I believe these are an overt message to Tehran.
I found it interesting when Tulsi testified, in front of Congress, Iran was not developing nukes. It appears to have been strategic.