Source: Apple
While we're expecting new Apple products in October, iPadOS might roll out a bit later. Bloomberg reports that Apple might delay the release by a month. It will go against Apple's typical style of releasing a new version of its operating system alongside the latest products.
The delay is supposedly due to the Stage Manager feature, which expands the multitasking capabilities of the iPad. It will let you group several windows into "piles" and keeps all the windows open in a tab on the left. It's already available in beta versions of iPadOS and macOS, but the iPadOS version is too buggy and confusing that Apple needs to rework it.