When there's a placeholder uploaded, the previous placeholder was replaced with the actual chapter. So everytime a new placeholder is placed, the new chapter was also uploaded at the same time. Hope this answer your question :)
I don’t think so because no new chapter was uploaded today with the placeholder.
Usually there is, but if I’m remembering correctly the ch. 73 uploaded before was a lower quality scanlation and not the official translation, which is was why it was replaced with this one and the uploader is notifying about placeholders again.
Could maybe the place holder be uploaded on the same day as the previous chapter? I get so disappointed when it says there is an update and it’s just a place holder. Thank you so much though for uploading!