Hey OP
As an adult heavy-boned hobby ballet dancer i've been really interested in this topic too! I have seen this table reposted by a student on ins - according to her this table has been published on the Vaganova website. She was talking about how she was heavy as a little kid (24kg) and instead of losing weight she maintained the weight until when she entered the academy at 10yo being 25kg (and i think somewhere around 135cm). She has videos online of her dancing at 8 and 9 years old and looked nowhere near fat, but among her first-year Vaganova peers she was looking pretty ''normal'' - thin but not even particularly bony or muscular. Most of those girls only grow to be muscular and skinny-looking from year 2-4.
I have a male friend who's over 180cm tall but only weighs somewhere near 65kg depending on food and amount of exercise. (There was a period of time when we'd often do sports together and he'd lose a few pounds every week and I none...sigh) His build is very slender and muscular and his weight easily drops to 60kg if he doesn't watch out, and he says that for a long time in his teenage days he only weighed 55kg which is even much lower than the Vaganova table requirements.
So i do think such people exist who weigh that little or are well able to weigh even less, and there may be people who even struggle to keep their weight up with such level of exercise in ballet. Although i am sure that many are constantly on restrictions and diets.
I agree with you that in the higher grades there is quite some variety in body shape. I have seen some students on ins comment that VBA doesn't particularly kick out students just based on weight numbers, but rather the full picture. However standing between all those thin girls, Russian teachers can spot a pound or two extra instantly. So in the end i think especially after puberty they are more lenient towards weight but they are probably not far off the weight chart. And I think the camera plays a role too since that usually adds 5 or 10 pounds to the picture.
In the end you should go for a weight that fits you and any ED is not about how much you weigh but the controlling mind behind it. Being healthy and strong and being able to dance for as long as possible is more important than just going to Vaganova