EntityDebugger's ComponentSystem profiler is easy to add to

string ProfilerName => $"{this.World?.Name ?? "none"} {this.GetType().FullName}";

Thats the key you can pass when calling

var sampler = CustomSampler.Create(ProfilerName);

so you can then call sampler.Begin() and sampler.End() around your code, and its profiler results will be included into the EntityDebugger system view average for the system. Needs

using UnityEngine.Profiling;

Its on line 160 of Unity.Entities.Editor/EntityDebugger/SystemListView.cs