That's a bit strange, normally it's the other way around, dSYM being included in release build and not in debug. Check your schemes and make sure Archive is using Release config. Then under your project's build settings select All and Levels instead of Combined. Make sure DWARF with dSYM is selected for your release builds and that Strip Debug Symbols During Copy is set to No. Is your project relatively new? Does it have an Info.plist?

According to the release notes it currently requires Apple Intelligence to be enabled at system level for it to work in Xcode: https://developer.apple.com/documentation/xcode-release-notes/xcode-26-release-notes