iOS 13.2 is another major release of iOS 13 bringing new emojis and the Deep Fusion camera Technology to iPhone 11 and iPhone 11 Pro series. Apple will be releasing iOS 13.2 before the end of this month.
The launch of Beats Solo Pro headphones is due next week and this iOS version is required for this new hardware to work.
The official Beats Solo pro headphones product page hints the release in the product description
they instantly set up—just unfold the headphones to power on—and then automatically connect to your Apple Watch, iPad, or Mac.
The footnote says
Requires an iCloud account and macOS 10.14.6, iOS 13.2, watchOS 6.0, or later versions.
Beats Solo Pro will be reaching customers on October 30th but the users won’t be able to connect them to their devices until iOS update is released.