Do peacocks get their feathers after plucking them?

no

Explanation:

But every year, toward the end of summer, peacocks finish shaking their tail feathers, and their stunning plumage gradually falls off.

If you mean regrow, then yes.

Explanation:

Males shed their tail feathers annually so there's no harm done to the birds when you pluck their feathers.

a- all cells come from pre-existing cells