I think either her own lawyer or Niji (probably Niji) made her stop tweeting. She hasn't tweeted anything since 1/9, and hasn't liked anything since 1/12.
She hasn't posted anything which could cause the other livers any trouble, unless the very act of tweeting was itself making Niji angry -- they can't claim she can't tweet on her business account due to recovery from her hospitalization, if she's tweeting from her personal account.
She also tried to communicate with the outside world by changing her steam name repeatedly, but that also has stopped. She's still playing Apex, but management is probably keeping a very close eye on that to make sure that all her matches are alongside randoms.
When is Niji's earnings call? Because between the upcoming voice pack sale and Kyo's graduation, I highly doubt she's leaving this month; if she's only still with the company to avoid drawing investors' ire, she'll be gone the day after the earnings call. If they keep her after that point, it's be because their plan is to pull a Gundou-Zaion wombo combo on her (keep her suspended until the day before her contact expires and she can graduate; and then instead of waiting one more day and letting her graduate, fire her on her next-to-last day with a laundry list of reasons why "true" Nijisanji fans should hate her, along with an unspoken but very heavily implied threat of blacklisting any content creator who collabs with her on literally anything at all)