Redux devtools is not usable for xstate. But they provide a great package:
npm i @xstate/inspect
or
yarn add @xstate/inspect
in your code, wherever you interpret the machine:
// add this statement before interpreting
inspect({ iframe: false });
const machine = Machine<DefaultContext, StateSchema, EventObject>(machineConfig as MachineConfig<DefaultContext, StateSchema, EventObject>).withConfig(machineOptions);
const interpreter = interpret(machine, { devTools: true}).start();
This will automatically start XState Inspector and will show you transitions while doing them, provided that you wrote the rest of the machine code correctly.