cmm Important to note that you need to include the cyclone/ part of the object name..I wouldn't have thought of that.
yes I mentioned it up here
giuliomoro (e.g.: [cyclone/delay~]),
This is due to the folder structure of the Cyclone externals: all the externals live as file in the cyclone/
folder. If you want, you can add another line
libpd_add_to_search_path("../pd-externals/cyclone");
to the core/default_libpd_render.cpp
file, https://github.com/BelaPlatform/Bela/blob/master/core/default_libpd_render.cpp#L382-L383, if you want the setting to be applied to all your projects, or provide a custom render.cpp
file with this change if you want it to be applied only to a specific project.