could padme have faked her death?

Yes she could have and did ! She was lying on a whoopee cushion full of fake blood !

Deaths in Star Wars can only be faked by falling.

If she had, she'd have taken her newborns with her.

I'm hoping she did fake her death and the medical droids also changed her skin color and she is Reva. I'm hoping thats the big reveal in the last episode. Vader would be shocked