fmriprep and conn

Hi,

I preprocessed my data with fmriprep, but when I understood correctly fmriprep only does a basic preprocessing and is missing smoothing and denoising right?
So can I load the preprocessed functional and anatomical file from fmrprep into conn (under structural the preprocessed anat and under functional the preprocessed functional from fmriprep?)
Then apply a functional smoothing step to my functional data (where can I find this command?)
And then continue to denoising. Here I am wondering because I cannot click on the "Denoising" tab, after finishing my setup. Is there any reason why?

Best,