If you go off previous cases where a creator suddenly stopped its usually because they've a) split with their partner; b) been doxxed; c) something health related.
That is to say, nobody knows. Her OF and socials are in the hands of an agency too, so a conflict with said agency is possible. Them just taking a break also entirely possible.
This is all just speculation though, we may never actually find out if they never come back and she'll just be another creator who everyone asks 'i wonder what happened to prettyinpinkxoxo?'