Is it possible to use common code of KMM module in common code of different KMM module?

Yes, it should totally work. Are you connecting dependency like so?

// build.gradle.kts

kotlin {
    sourceSets {
        commonMain {
            dependencies {
                implementation(project(":messenger"))
            }
        }
    }
}

Thank you for answer and sorry for late reply. Messenger module has 2 methods: send, register. Send allows you to send message to registered receivers and register allows you to register callback as a receiver. I am connecting Messenger to mainModule the same way like you have shown. After doing so everything works fine on android. On iOS I can see and use contents of messenger module in mainModule, but if I will send message from mainModule using method from messenger I am not receiving it in any other module even though it is the same reference of messenger .xcframework. When I am connecting messenger to mainModule through native parts (Cinterop) everything works fine. Doing so I have to multiply common code of mainModule for every architecture like I said at the beginning. Is there something I am not seeing or doing wrong? Should adding by project tag work this way?

In your KMM module are you specifying all supported platforms in gradle? Kotlin doesn't support just a generic "kotlin" library. You need to add each target in gradle you want to support even if you only are writing code in commonMain

Yes, i am specifying all supported platforms. First photo contains my project structure (supported architectures), on second one you can see mainModule source set configuration. I am adding messenger to every architecture using "project" tag. Doing so I can see and use contents of Messenger on every architecture without any errors but when I generate final binaries for both modules - .xcframework and try to test it on swift app, it is not working. I mean I am adding messengerModule, mainModule as dependencies to swift testApp, next I am registering callback in test app to receive messages using messengerModule. Next I am starting process using mainModule, which should send message using messengerModule and I am not receiving it in test app callback, even though it's the same reference of messengerModule. I really don't understand why. On third photo you can see other way of using messengerModule in mainModule, I am adding messengerModule as dependency using C-Interop. Doing so I can see and use contents of messenger just in native architectures, I cannot use it from commonMain what results with multiplying code. But when I am testing it from swift app, and doing same process as described above I am receiving messages in testApp callback sent from mainModule using messengerModule. Can someone explain why I am not receiving messages in swift testApp callback from messenger used in mainModule by "project" tag even though it is the same reference? Am I doing something wrong?