For anyone trying to use Jetpack Compose Web on Kotlin 1.7.10: You can disable the version check with

tasks.withType<org.jetbrains.kotlin.gradle.tasks.Kotlin2JsCompile> {
    kotlinOptions {
        // Jetpack Compose doesn't support Kotlin 1.7.10 yet, but the latest version seems to compile just fine under Kotlin 1.7.10
        freeCompilerArgs += listOf("-P", "plugin:androidx.compose.compiler.plugins.kotlin:suppressKotlinVersionCompatibilityCheck=true")
    }
}

The project compiles and runs fine after disabling the check, using

1.2.0-alpha01-dev750

:)