The day before yesterday, the September minor update of Business Central was released.
Today I confirmed the minor update notification in Admin Center (Region JP).
The Minor update typically happen once a month. You won’t be able to schedule minor update, but the update will use the Update Window that is set in the Business Central Admin Center (Example: 00:00:00 – 6:00:00).
The minor update will happen automatically during the Update Window you set in the Business Central Admin Center.
Hope this will help. Thanks.