What happened to the damage David inflicted on Walter?

Greetings AliensQna.

In the novelization Daniels rams that nail in David 8's eye and it heals similar Walter's neck wound.

"As he tossed it aside, the injured eye began to cloud over. A temporary optical glaze formed as the material repaired itself. Internal capsulation that had no counterpart in a human body pumped fresh restorative replacement material into the eye."

Alien: Covenant novelization, page 292.

Walter's Fate

Walter most likely healed. Unless David took the time to cut off his head and place it away from Walter's body on separate sides of the hall of heads then I assume Walter healed again and he is pouting on the surface of Planet 4 waiting for David to come back with the ship. There is much work to do and all these games have to stop.

I assume the Engineers have some sort of alarm system (remote awareness) and if David's actions on Planet 4 didn't trigger this alarm then what would.

In the movie, the flute wound visibly appeared to close/start to heal if you look closely.

Watch and listen at 3:05. Healing?

https://www.youtube.com/watch?v=RHRBSUTFfo0

wev all talked in length about this scene and its still being debated. for me its one of the worst scenes, explanation wise, RS has ever done. the fight scene itself is fine its just the timeline that is messed up. RS has stated it is David and not walter at the end of the film which ok I can take, but it just doesn't hold water how it could be done. Daniels is unaware of the damage inflicted on Walter during the fight so that part is fine, its all the rest. and as far as the book goes. I don't hold the book in any regard at all. its a decent read but it has far too many inconsistences in it to be taken as gospel.