Trying to set a object reference to ConstantQNRT

Hi all. I’m trying to set an object reference variable to a ConstantQNRT that I made, however nothing shows up in the asset picker. The object does inherit the base class, the plug-in for Audio Synthesizer is enabled and my project is in C++.
My workaround is to get the class and construct the object, but it seems like that doesn’t let me use its functions properly. Please help if you can! I’m open to anything.

Note: the tutorial does it fine here: at the time pasted. Where he puts in the default variable, I can’t see my type I made while he can.