How to confirm the service interruption in NSA gNB inter HO (SgNB Change)?

Hello Experts,
How to confirm the service interruption in NSA gNB inter HO (SgNB Change)?

You can test it using DT from the field which will show lower throughput values during testing.
We tested before and after the inter-gNB HO activation and throughput was going to zero before activation and after activation, it was having lower values during HO.
But, it depends also on the tool you are using as this interruption time is very small, so maybe even some tools cannot detect it.