Hi, being in the process to learn profiling with Unreal Insights myself, just my 2ct:
I do profiling on my mobile android device and found, that the asset loading tracks only appear, if you start your game with the correct options.
-trace=Log,Bookmark,Frame,CPU,GPU,LoadTime,File,Net
Found this by chance, when adding all 8 flags to the options, because my problem is, that I do not get any GPU data in my capture.
I assume, that it is LoadTime or File option making this data you are looking for available (did not check which one)
In BaseEngine.ini, only these values are defined as defaults:
[Trace.ChannelPresets]
Default=cpu,frame,log,bookmark
Rendering=gpu,cpu,frame,log,bookmark
I hope, this makes sense.