Hello,
paraview last version 5.12 is now available in conda-forge, but paraview also ships official plugins and these plugins are not packaged (it makes paraview package incomplete).
Would it be possible to add those plugins in the current package or maybe another one?
Thank you for your time.
Depends 
If they are part of the same source, you can package them as separate outputs in the same feedstock. If they come from different sources, the best way would be to submit each plugin as a different recipe via staged-recipes.