Is there a recommended place/callback to use for the first composition, analogous to fragment's onCreate?

Maybe DisposableEffect? https://developer.android.com/reference/kotlin/androidx/compose/runtime/package-summary#disposableeffect_1

Hey, looked into it, not exactly what i was looking for but good to know about it! Thanks! 🙌

Do you mean the setContent call in the Activity’s onCreate method?

Hey I explain in detail in this thread :) --> https://kotlinlang.slack.com/archives/CJLTWPH7S/p1614468393124400?thread_ts=1614468393.124400&cid=CJLTWPH7S