I think just ignore her whatever she says or does, maybe she is jealous of you or something as they are not together anymore . Just be yourself, that’s the most important thing now. Also stay positive and everything should work itself out in time hopefully . Goodluck with everything.

Just ignore her and do what you do. She can’t rule his account.

Eww she’s looking for drama and being extreme. Why do they have each other on socials if this is how innocent interactions go down?

Perhaps your partner needs to tell her that he is not interested in her immature comments and that he will not be asking you to remove your comment. Its time for him to back you and let her know that he will not tolerate her being petty so it best stop now.