*Reproducible on:*
* Unity version: 2021.2.0b2 and 2021.1.13f1
* VS version: 1.7, 1.6
* Platfor: Windows 10 and macOS Catalina

*Steps to Reproduce:*
# Create a new project (most probably a "new" project is not necessary but was the step that we could repro steadily)
# Create a new custom node, right-click on Project->Create->C # script
# Open the created script and copy-paste the following code and save
{code:java}
using Unity.VisualScripting;

public class MyNode : Unit
{
protected override void Definition() //The method to set what our node will be doing.
{
}
}
{code}
# Regenerate Nodes from Edit->Project Settings->Visual Scripting
# CReate a new Script graph
# Click to open the fuzzy finder

*Actual Outcome:*
* The newly created node does not appear on the fuzzy finder
* The node does not appear on the nodes DB

*Expected Results:*
* Custom nodes should appears on the fuzzy finder.