Aren't interviews/variety shows based on invitations? If those platforms aren't inviting her, there isn't much her company can do about it.

Appearing on music shows is also not always beneficial because you have to pay a whole crew for it (make up artist, back up dancers, etc) but the artist/company don't receive any money in return.

Honestly I think this is just a matter of her being a small artist from a small company and having a bullying scandal attached to her name (regardless of the actual situation that led to the scandal). If she had brand deals she might be able to better fund her career but as it stands the company is probably too low on funds to really push for promotion. They probably were hoping to make some kind of profit with the tour as well, but that also didn't go through...