Is there a new equivalent to uikit application configuration? The following code doesn't work anymore after updating Compose to 1.5.10.

compose.experimental {
    uikit.application {
        ...
    }
}

Yes, we have removed this functionality. Now the recommended way to create projects with iOS target is to use KMP wizard -- https://kmp.jetbrains.com/

Sad to hear, but thanks for confirming! It was really nice to have Kotlin only projects. 🥹

is there a way to add the iOS target to an existing compose multiplatform project?

Yes, of course. You need manually configure Gradle build scripts for this taking https://kmp.jetbrains.com/ generated project as an example. Unfortunately there is no automation for this, you may create an enhancement for this in Fleet issue tracker where KMP tooling is developed now

ah crap - i've removed all the xcode projects and now i have to add these back in again 😞 would be nice to have kotlin-only projects