So with your eyes only you can see the P3P that far up and way!
That is amazing, I have 2020 vision and I am a GA pilot used to scanning for traffic. And I loose sight of the P3P at about 400m distance and altitude combined.
The test is to look down at the iPad/controller and then look up and try to find the MR. Especially if there are clouds and a bit of hazy sky.
Larger Hexas I feel I can see about 600m out, but I don't fly anything further than out that.
I am pretty sure Canada has an altitude limit as well for model aircraft. If they don't they should.
Here in the US it is 400' AGL (120m), you can argue if it is a law or just a rule. As an AMA modeler, you have to follow the AMA guidelines and those are max altitude 400' always in sight, and a few other rules as well, or your AMA insurance is no good.
Fly safe and have fun...