No. That's not possible. Since that would mean, if it is a 4 core phone, your app will only be able to spawn 3 new isolates, since your app is already running on the Main Isolate.

Isolates are like wrappers around threads. An event loop and some memory.

The OP has written beautifully. But

here is a link for reading in detail: https://medium.com/flutter-community/isolates-in-flutter-a0dd7a18b7f6