Please help! Keiki? on a dying/dead plant

[Bribie]

Hello everyone, I’m new here!

I have a dying (or it might be already dead) phal with enlarged node, maybe a keiki, from my friend. The friend’s daughter is very frail and emotionally attached to this orchid and they are very hopeful to see the baby of this plant if the plant can’t survive though I have no experience with keiki.
The phal was rotted everywhere except this stem. I cleaned and cut all rotted black parts off and sprayed hydrogen peroxide and let it dried and sprayed again for a few times.
I had to cut about half of its crown off.

I placed this on wet sphagnum and mould started around the crown. Then I put this in a tall glass jar with sphagnum on its bottom and the crown started to mold. I sprayed it again yesterday and it bubbles a little. Let it dried and sprinkled cinnamon on it. I don’t know if this plant is still alive or not. Is there any chance this keiki (if it’s a keiki) survive? What should I do? I think the keiki (?) is bigger since I received this about 3 weeks ago though the growth is very slowly.