I'm not totally on board with this.

You guys aren't remembering Baby Fae, who in 1984 received a baboon heart because a replacement heart wasn't available. She didn't make it long, but it was controversial at the time.

What Happened When a Baby Girl Got a Heart Transplant From a Baboon

IMHO, having lost my wife's young nephew in 2020 while he was waiting for someone else to die to give him a new kidney, other options are always good.

Grab a pig heart and have pork chops for dinner. Win-Win.