Trying to work out Irans options here
Israeli airforce militarily has not been affected so will continue their bombing and has the advantage to be resupplied all the time. Iran on the other hand will find it difficult to make new missiles and is slowly losing its stocks/launchers.
If Iran has large stocks their aim would be to hunker down and keep hurting the aparthied state even with symbolic strikes where people run to bunkers. Make this unbearable for Israel. This seems tje current strategy.
If the US enter the war which i think they will, trumpy needs an exit strategy which is either Iran surrenders unconditionally or he topples the government which will require boots on the ground and extensive bombing over a long period. Trumpy could find himself bigger down we saw with Yemen he doesn't have the stomach for a protracted conflict.
So if your Iran your options are to negotiate a deal where current government survives and nuke program is abandoned, problem with this i can see severe conditions like dismantling or limiting missile program still be enforced, or hunker down and hurt the US and Israel where they end up accepting a stalemate ceasefire. Issue with this they will push snap back and try enforce containmentike they did with saddams Iraq.
At the moment the pessimist in me doesn't see a long term move which can benefit Iran with current government. The wild card is if China Russia or others decide to ignore UN sanctions and help Iran rebuild and militarise. For this Iran may need to make painful concessions.
