What happened after the end credit scene in the last episode of What If...?

The Planet Earth is in the grip of a Quantum Virus which has turned most of the population into zombies, and the only hope for salvation lies in the hands of three surviving heroes. But as these survivors race to Wakanda to save the world, they are unaware that the Mad Titan, Thanos, has also been affected, and is waiting for them in the Golden City...

Post episode 9, what happens after Gamora returned to her universe to be with her Tony Stark?

This is my alternate ending to What If...? Episode 9. Peggy and Natasha have a moment alone before Peggy goes home. I didn't edit so please forgive any typos.

Set during What If ep 1: Peggy is aware of his medical history. It upset her that a man who is so kind and so humble had to live with all these conditions. If everything went according to plan if Steve took the serum he wouldn't be standing here now struggling to breathe. That day was Steve's chance on getting better. Peggy took that chance away from him.