It's very hard to mimic real world network properties - hence why we have actual netcode debugging in the game, as it gives us the very best and real data from the real world.
So, if it was easy to reproduce (especially with on a global scale stupendously good internet in Sweden for instance) - we would have done so already, the low hanging fruit is all plucked already.
That said, this issue might not be netcode/networking at all - it could be some other issue, and getting proof for this via netgraph is very valuable too.
So this is why we ask for video with the netgraph enabled from many sources, it helps narrow down the issue much quicker (and in many cases goes from unreproducible to having information enough to put en engineer on looking at a fix and the code for a specific issue area).
Thanks!