Create a symbolic link in the top level directory. In this example I have Blender installed locally at $HOME/Apps/blender-3.1.2-linux-x64
cd io_mesh_objpov
ln -s $HOME/Apps/blender-3.1.2-linux-x64/3.1/scripts/addons/io_mesh_objpov addon
make install
make distclean
cd ..
Next open blender and navigate to Edit->Preferences->Add-ons->Testing select [x]Import-Export POVRAY Mesh2 (wrapper)
It is best to save selected meshes instead of combining them in one file. I like to save my materials in a separate file, as well.