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kotlinlang

Not an Android dev, but got a question: if my multiplatform project targets `jvm()`, how do I make sure it also supports Android?

If you're not using any android specific stuff/APIs, then just declaring `jvm` should be enough as java libraries are available to android without any extra effort.

To be conservative and support as many users as possible, yes.
 you can also take a look at this section <https://developer.android.com/build/jdks#compileSdk> to see the compatibility matrix between recent android versions and java versions

bytecode level doesn't matter *too* much if the users are using desugar, which is common. but regardless of the bytecode level, there's some classpath APIs which aren't available even with desugar, so you should avoid them for Android users

&gt;  Bytecode level should be 52 (1.8) right?
No, Android desugarging supports up to 21 (22 not sure, never checked)
But to check if specific API is supported by desugaring, check this doc:
<https://developer.android.com/studio/write/java8-support-table>