Yes. JJK follows a weekly release schedule. But sometimes there might be slight delays or breaks due to various reasons. Still, for the most part, it's a weekly manga that fans look forward to regularly.
The weekly update time of " Celebrating the Year 2 " was: members would update two episodes every Monday to Friday at 19:30, and one episode every Saturday and Sunday at 19:30.
Well, publishing a weekly novel involves several steps. You've got to have a well-structured plan for releasing chapters consistently. Also, build an online presence to promote your work. And don't forget to interact with your readers to keep them engaged.
Oshi no Ko is indeed a weekly manga. You can expect new chapters to come out every week. However, there might be occasional breaks or delays due to various reasons.