Can confirm this is now working again with Beta 3. Xcode 26.6, Tahoe 26.5 debugging on iPadOS 27 Beta 3.

I know in the past that various pre-release betas were broken in the current production Xcode, but were later fixed and ended up working fine. Are you saying it's never been supported to simply run an app in debug from a production Xcode version to a pre-release iOS/iPadOS version?

Also opened a ticket, and after a week of no response I followed up and was told to request again to see if I get a reference number this time (different from the case number). The fact that the documentation doesn't list any of this as a pre-requisite for using the framework is also frustrating. In addition to some apps apparently receiving preferential treatment in getting not only the entitlement, but the feature working for the launch of 17.4.

Same error here.