Yes, it shouldn’t show nvidia cards when set to opencl by default. Since nvidia cards only support opencl 1.2, which is a lot slower than the version amd cards support (version 2), blender doesn’t list them under opencl unless you launch it using some obscure developer flag (When i had a hard time looking up so I gave up).
I was saying that since there are probably some rare cases where someone wants to force nvidia cards to use opencl, the developers wouldn’t be able to automatically switch the setting from opencl to cuda when the cards change.