I really never use J-Novel to see release dates since it's frankly a bit of a mess. I use Amazon because they always list out the next volume and the day it will be out. Like this: https://www.amazon.com/Ascendance-Bookworm-Part-3-ebook/dp/B08KSLBFN3/ref=sr_1_2?dchild=1&keywords=ascendance+of+a+bookworm&qid=1607699437&sr=8-2

I'll add that to the guide, I can't pin it though since we try to keep the most recent Volume (Or episode when an Anime is airing) pinned so allow for easier discussion