The sheep in this example didn’t repent.
He was kidnapped and forcibly brought back. No repentence. Forced repentence is no repentence at all.
I’ve searched for the post with the “kidnapped” sheep. Too far back to find I guess. At any rate, only Satan and sin can kidnap a sheep, and even then the sheep has a foreleg in it. Jesus has defeated Satan and sin so the sheep, even though “kidnapped” is still His. He will do with it as He wishes in due time.