Thanks for your feedback, eddierm!
I'll need some free time. Give me a few weeks. Until then you can keep exporting to joplin. Eventually joplin will be removed as the setup is pretty involved and joplin itself isn't still designed for this usercase.
Don't worry, we won't drop joplin until we make sure the nextcloud exporter is in good shape.
Let me know if you have PM's enabled. Once I double check everything works fine here I'll send you a message with temporal credentials on my own instance, so you can test it works on your end.
Ademas, por privado, podemos hablar en nuestra lengua materna