So it says in hiatus, but is Viz dropping the series after 24 volumes?

English Publisher [Edit]
Viz (24 Vols - Complete)

I wouldn't blame them. I read the first chapter when the manga started, and followed it/bought all the books up until 10, and then wanted to wait until it was finished to continue the series. I didn't want another long as hiatus like Fushigi Yuugi - Genbu Kaiden (and look what happened 🙁.)

And the time between Fushigi Yuugi - Byakko Ibun and the new series Fushigi Yuugi: Byakko Senki. AND the time between the release of the first volume of Byakko Senki (2017) and we're now in 2021 and no second volume? 🤨

I hope they're not loosing steam, especially since they've started a new series. Is there something wrong with their health or some other circumstances I don't know about that's causing the slow releases on their content?

The original 24-volume tankoban release is, by all-intents-and-purposes, cancelled. Watase herself stated in her blog that it would no longer be published. ([https://ameblo.jp/wataseyuu/entry-12674523753.html)

However, the series itself has not ended. For the past couple of years, new chapters have been published exclusively for Remastered edition of the manga and follow its numbering due to the significant changes and additions that version of the manga brought (hence why its being listed on her as ongoing while the original tankoban release is stated to be on hiatus).

So the problem lies solely overseas. Whether it be a scanlation team or Viz, whoever continues it is going to have to start over from the beginning, since the Remastered edition has gone through significant rewrites and additions (so much so that there is about a 20-chapter difference in the chapter numbering by the time it catches up to where the tankoban release (ex. tankoban's #228 is Remaster's #245).

Viz would probably balk at having to retranslate previous covered material for a property that, honestly, probably didn't make them as much as other bigger titles, and the scanlation team that handled the tankoban release (PKR), has been inactive for years. Some new people would have to pick it up.