Symbolicate iOS app crash log

I have a .NET8 iOS app that builds and tests fine locally, but when I submit to the app store for review it crashes. I have a crash log from Apple, but I can't find any way to symbolicate the crash log.

When I create the .ipa for submission to Apple I use Publish to Folder in Rider, but it does not generate a .dsym at the same time. There is a .dsym in the ios-arm64 folder and this seems to match but when I run Apple's symbolicate crash it still has the stack frames in the crash report showing memory addresses rather than symbolic names.

Any ideas how to resolve this?