Because there’s only two statuses on this site, “completed” and “ongoing,” so unfortunately, if a manga, etc. is dropped by the mangaka/artist or the translators/scanlators (or is on hiatus) it gets lumped under the “ongoing” category.
The reality is, there may be no one working on that specific work at all, or untranslated chapters could be floating around with no one willing to finish translating them
…or it IS actually finished but the status wasn’t updated to say “completed.”
I’ve simply learnt not to trust the completion status 100% of the time
A lot of them have cliffhangers at least the ones I’m reading but Shen Yi Di Nu stopped updating for a long time then one day it updated
But during the time it wasn’t updating it was on different sites
I’ve been wondering lately why are some stories say still ongoing but it’s been months or years since it updated.