I understand the reclaiming in the grand scheme of an NTR, but how do you reclaim what’s been taken.
You don't.
The "reclaiming" fetish is usually for narcisistic men who just want to feel superior, and usually isn't heavily associated with cuckold, more with sharing. Often depicted in western smut as the chad dude-bro who shares his girl with his loser friend, but isn't afraid at all because he knows his loser friend can't fuck his girl as well as he can. I haven't seen this "reclaiming" bullshit even once in hundreds of japanese netorase works that I've read through.
Now, there's also the cuck who likes to fuck his wife after she has been fucked by another man, but that's not "reclaiming", that's another fetish entirely.
As I said, the people pestering for "reclaiming" and "reaffirming" are people that don't actually like netorase, and are likely trying to derail the story... and Saxxonado seems to be caving, as they've already made alterations to the story more than two times due to stupid complaints.