Nice, good choice IMSO. Kotlin Native Multiplatform Mobile would make an iOs app less porting work. Only the UI/Views would differ, ViewModels, http client and DB can be shared via Ktor and SQLDelight.
Currently I'm doing JVM only using Retrofit and Jackson instead of Ktor. Mostly because I know the JVM ecosystem best and supports all my target platforms. It's delightful to work in a big monorepo that shares API models all the way from the backend to the clients.
