Enjoying the notebooks available within ArcPro 2.5, but it would be nice to have the nbconvert options to export to other format (html, reveal slides).
I think they are trying to keep the interface small if you want to use it inside of Pro...Using it outside it is full-fledged and you can use jupyter lab too if you want more options
We will be addressing the need to have these standard Jupyter Notebook elements back in the notebook interface -- but as you mentioned, the underlying code is already present (nbconvert), as is Jupyterlab for folks who want to use that in a standalone interface.