So the Ponds didn’t die.
Like they lived and had a fantastic life together, and they died happy and old and fulfilled.
The whole episode was an elaborate excuse to have the angels “kill” Rory and Amy because you can’t be killed by the Angels when your best friend has a time machine.
Sarah Kingdom actually died, Peri actually died (I’m convinced that what the Time Lords show Six isn’t actually the truth because it’s much better if she did die, as Nicola Bryant has said in the past as well, and you can’t convince me otherwise).
The Ponds didn’t actually die.