The dock is a special case and requires some specific voltage/amperage support. But the switch itself abides by EU regulations.

Yeah, there's always a "special case" with USB-C, isn't there.

65W Apple charger.... My Lenovo 65W USB-C charger had no issues at all.

The Switch dock requires the 15V PD profile, which the (old) 61W adapter from 2016 did not support, but the newer 61W adapter from 2018 does.

A USB-C PD brink specifies which voltage and amp combos it supports charging, and the one that the dock & switch ask for as their 'optimal' power profiles most apple USB-C bricks do not deliver, despite having the wattage capability for them.

There's this third party portable dock that can help

https://www.genkithings.com/products/covert-dock

Which of Apple’s chargers? Each of them has different power capabilities.

That's a slightly different problem. Charging the device vs the dock working. I almost never used the dock, but I charge my device all the time with other USB-C cables.