Custom events traces not showing in systrace

I am using this command to capture systrace from my pixel3

python systrace.py -a "com.my.sampleApp" -o trace.html

I am able to see my Application's traces(UIThread, Render Thread ....) in the systrace captured but i am not able to see custom events which i have planted in my code

I followed steps from here - https://developer.android.com/topic/performance/tracing/custom-events#managed-code

I can see the custom events when i do cpu profiling in Android studio but cant see custom events in systrace

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