Never. kmp-tor's Android service is configured to export=false. Developers can lock down notification action Intents even further by declaring a signature permission in their manifest, and configuring the service with their custom string. Giving any app on the device access to a Service or BroadcastReceiver requires careful work given the security implications.
Most app's only need access to the tor network while they're running. kmp-tor provides that for them. Archiving kmp-tor and doing something like an Orbot app would be asinine.
The application I am working on uses kmp-tor, but yes, I have baked into the SDK's IPC protocol InetSocketAddress and UnixDomainSocketAddress information for immediate access to a tor socks/http proxy, either by requesting it via Intent, and always being sent along with the forwarded http calls.