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.
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.
The JJK manga is typically released on a weekly basis. However, factors like the author's health or production issues could potentially cause occasional changes to this schedule.