Canada has similar rules even in the Trusted Traveler lanes. It's not explicitly required, but if I don't remove all large electronics and some chargers the size of/smaller than a smartphone, my bag will get to secondary, swabbed, some of the chargers divested to a bin, and re-scanned. This occurred earlier this year and last year before the US directed foreign ports of departure to implement such measures explicitly.

I've been told that the Precheck lanes have a minimum quality for X-Ray than general screening lanes (e.g. higher resolution/clearer image) but I have no idea if that's true or not. I was told this at a small airport in the midwest where the agents are polite and generally thorough as to why they gave Precheck light instead of Pre treatment when one line was open and I was the only person in it...