No sorry I don’t think the monitoring works fine.
If a monitoring server has the purpose to monitor port 123 UDP and is connected via networks that drop UDP Port 123 packets, the server fails its only job.
Your MTR shows that the packet loss starts in the routing path and the server owner has no impact on that. Since the project works DNS location based it’s also kind of uninteresting what a station in NY thinks the status of the servers in the EU might be.
The monitoring of the project will be probably ok once the station in Amsterdam is live and connected via a network which fits the requirements.