Duende Native V4.0.6 RTAS plug-ins are found in their appropriate category within the Protools plug-in Menu.
Channel - Dynamics, EQ
Bus Compressor - Dynamics
Drumstrip - Dynamics, EQ, Harmonic
Vocalstrip - Dynamics, EQ
X-Eq - EQ
X-Comp - Dynamics
X-Verb - Reverb
If you are using Duende v3.6.6 software the plug-ins are found in the 'Wrapped Plug-ins' section.