Author has written 3 WN arcs of the story(and has the 1st 2 published), but says any potential future updates will be determined by how well the LN versions sell.
Vol 1 came out during the start of Japan's Covid lockdown, so a lot of closed bookstores meant sluggish sales and "lack of publicity" for the LN's existence. Plus author is also worried at how competitive the LN market is and that Villainess Butler may get overshadowed.