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kotlinlang

I would expect that it should import it no problem

I also find this strange. If it's possible for you, would you mind sharing a zip of your project?

Also note that expect/actual classes <https://www.jetbrains.com/help/kotlin-multiplatform-dev/multiplatform-expect-actual.html#expected-and-actual-classes|are in Beta at the moment>, so there might be some hiccups

There is a subtlety with expect classes constructors that make them different from the usual classes. Basically, here you declared the expect class without any constructors.
If you change it to `expect class CrashlyticsManager()` (note the parentheses) it would also mean that all the actuals should have the zero-argument constructor explicitly mentioned. That's why you can't reference it in common—because, basically it doesn't exist from the common source point of view.