If microflow is triggered and breakpoint also placed properly then It might be due to the state of the debugger in your studio pro. Please ensure that your debugger is in connect state. You can do it by navigating to Run>Debug
Check out this doc for more details... Debugging Microflows Remotely | Mendix Documentation
Hi Dinesh Kumar
To debug microflow you have to set a breakpoint in any of the event and just run your app locally. If the breakpoint is not triggered try to click connect which will be in the same row where you see debugger.
and ensure that the microflow is used in your flow.
I hope it will be useful.
1 thing to add further to all the other valuable answers is: when you set a breakpoint check if it is ENABLED (it glows in RED) only then the program control would stop there.
This is “sense” would come naturally when you start playing with Debugger.