Isn't her new mother her adoptive mother? So it's still the same Romani group that raised her, no?
Wanda’s (most recent) biological mother, Natalya, died shortly after Wanda and Pietro were born. They was raised by their mother’s brother Django and his wife Marya. Django and Natalya are siblings so yeah, they would be from the same group (or groups), though that isn’t necessarily true of Marya.
If you’re referring to this:
As a sidenote: her new mother is almost certainly from a different group of Romani people than Magda (Magneto’s wife, who was Wanda’s mother the longest), but we don’t know the details.
Magda was Sinti. Django and Natalya were from Serbia (or thereabouts), which means it would make no sense for them to be Sinti. Because of that, Wanda has gone from being Sinti to being some sort of Roma. (I guess all those people who insisted for years she was Roma, rather than the broader and more correct Romani, became right eventually.)