This looks like it's fixed in iOS 26 Beta 1. If you use the extension workaround above you get a warning Conformance of 'Schema.Version' to protocol 'Sendable' was already stated in the type's module 'SwiftData' 'Schema.Version' declares conformance to protocol 'Sendable' here (SwiftData.Schema.Version)
Topic:
App & System Services
SubTopic:
iCloud & Data
Tags: