I will say though, it's evident that those boys have absolutely no routine. They have breakfast, lunch and dinner at seemingly random times (ie whenever their parents can be arsed to do it), they have both napped at different times each day - too early, or too late which means they clearly don't have a set bedtime or wake up time.
Kids thrive off regular meal and (when young) naptimes. I feel like their home life must be so chaotic, despite having two parents who are at home all day, because their parents spend their entire lives living through screens and they're constantly farmed out to a grandparent.
So it's no wonder that parenting them the same hasn't worked, or that there are sleep issues now. They've never been properly addressed or a routine put in place.