Understood. In my case, as far as aftermarket plugins with presets go I am using only Waves and iZotope, with maybe a few exceptions, SIR2 and Redwirez - both IR plugins. It seems everyone who can write/clone code is creating plugins these days but not everyone can really do it correctly. Brainworx and Sonnox are good companies, there shouldn’t be a problem with them.
I hope PG comes back here and maps the chain for you but this kind of search for me always seems a rabbit hole. There are just so many places to place files and not every plugin company is thoughtful enough to include a sub program that allows for a Preset search - even if you did know where they were. Too, both SIR2 and Redwirez asks you where you want to store the presets actually, something many do not.
Back to you, I have to admit that it puzzles me that Cubase can find the presets and WL cannot. Perhaps you installed the plugins after Cubase and the presets sought out a Steinberg file address? I’m speculating. Best of luck.
You should also tell PG what your OS is so he might stand a better chance to help you.