IAF is literally chasing tracked and wheeled AD systems in Iran.
A Battered Iran Signals It Wants to De-Escalate Hostilities With Israel and Negotiate
DUBAI—Iran has been urgently signaling that it seeks an end to hostilities and resumption of talks over its nuclear programs, sending messages to Israel and the U.S. via Arab intermediaries, Middle Eastern and European officials said.
In the midst of a ferocious Israeli air campaign, Tehran has told Arab officials they would be open to return to the negotiating table as long as the U.S. doesn’t join the attack, the officials said. They also passed messages to Israel saying it is in the interest of both sides to keep the violence contained.
The US (B2+MOAB combo) would have to get involved sooner than later to mop up Iran's tunnel network. Tactical bunker busters in IDF inventory would be useless against them. And Israel won't declare a ceasefire without it.
So apparently the Bunker Busters are in limited quantities with IDF. They are likely to need replenishments. A couple of nuclear facilities are too fortified to be destroyed using the current munitions being used in Iran. The IAF is also abstaining from completely destroying some structures as they risk absolute contamination/leakage. A retired german ambassador to NATO provides his comments:

I have proof!It's AI generated he's just coping. No IAF fighters have been shot down or gone down yet but the longer the war goes and the intensity IAF is using their strike fighters eventually it's going to happen.

Are you seriously trusting Pakistan sources lol
www.livemint.com
I have proof!![]()
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The last Tomcats operational anywhere in the world. Wonder how the Iranians managed to keep them flying all these years without OEM (heck, even they are history) support. Black market spares?