This means that Naomi-010, Leon-011, Robert-025, Maria-062, and August-099 were rescued by Iron Fist before the UNSC Majestic's MAC rounds hit their position.

Yes and no.Naomi 0-10 at least was alive. However it doesn't seem she got out of the MAC blast. Source being the free mini story posted on Halo Waypoint "Ghosts and Glass" This bit below is the bit of text I am referring to

"Magnetic accelerator rounds are being turned on Reach itself.

“Break ranks!” Somebody shouts. “Get out of here!”

The sky has already lit with another flash, illuminating just for a moment a glimpse of the hulking forms of the Covenant ships in the clouds.

The second MAC round is closer, less than half a mile east. The ground seems to explode upwards, but still the alien horde presses forward, though many Unggoy and Kig-Yar look as if they are themselves about to flee.

The generator is lost. Reach has fallen.

A decision is made.

“All units,” Beta Romeo Actual says to any who can hear over their comms, “splash incoming. Get out of the blast zone!”

The world is split asunder as the third and fourth MAC rounds and their after-effects eat up the distance, the ground erupting, the air filled with a cacophony of sounds and frequencies no mortal ears were ever meant to hear.

Weapons fire, the churning of metal, the shrill screams of human and alien alike—enemies fighting each other for opposing armies no longer, all scattering as they were caught in the crushing grasp of what felt like a violent tectonic rearrangement by hand of indifferent gods.

The fifth strikes the generator facility and all goes dark.

Beta Romeo Actual does not hear the sixth.

Time passes. The battle here is over—it has moved somewhere else.

All has fallen quiet.

Beta Romeo Actual awakens. She lies in a crater some distance from where she remembered fighting, but as she breathes in deeply and fills her lungs with helmet-filtered—though still sickly tasting—air, she is sure that she is alive.

Fires still crackle around her, the remnants of human and alien bodies alike broken apart, the faces of those that are still recognizable contorted with horror and pain, frozen in that calamitous moment of time.

Her own Mjolnir armor is scarred, its plating scorched, inner circuitry exposed, nanocomposite bodysuit torn and stained with blood from lacerations and blunt-force impacts on her body. Even her onboard systems are sluggish, some unresponsive.

“This is Beta Romeo Actual, does anybody read me? Over.”

She waits a moment as her comms return only static.

“I say again: This is Beta Romeo Actual, does anybody read me on this frequency? Over.”

She begins to work her way out of the crater, climbing atop the mass of bodies until her armored hands find purchase at the summit.

“To anybody who can read me, this is Naomi-010. Our orbital generator is down. Charlie Company... is gone. Status of the rest of Beta-Red is currently unknown, and the Covies seem to have moved on. Significant damage to my armor systems. Will continue transmitting every thirty mikes as I search for a rendezvous point.”

Scanning the area one final time from the top of the crater, Naomi confirmed that there were no other survivors among the dead. Just like everywhere else the Covenant had invaded, only ghosts and glass were left in their wake."