How to get compose iOS app signed properly and upload to testflight/appstore?

Sounds like a blog post :)

While the technology is experimental and there is no convenient way to publish. It is possible to install on the phone: https://github.com/JetBrains/compose-jb/tree/master/experimental/examples/falling-balls-mpp#prepare-xcode-to-launch-on-ios-device

I found out that the project id that xcode create must match the id in compose project, otherwise it will failed to install with

A valid provisioning profile for this executable was not found

error.

Where this project id are setting in compose project? Do you mean this block of code? https://github.com/JetBrains/compose-jb/blob/b1fe574a7ec358bcd4438d158b3145a7c26b0f87/experimental/examples/falling-balls-mpp/build.gradle.kts#L155

yes, it seems that compose combine the bundleIdPrefix and projectName as bundle identifier, and it needs to match the bundle identifier in the xcode project.

Yeah, thanks for this investigation