I can not see iCloud Folder in jupyter notebook

While someone can launch the Jupyter Lab or Jupyter Notebook software from the iCloud directory, as described in the accepted response, this will need to be done each and every time you want to access Jupyter notebooks within iCloud. Instead, I prefer to create a symbolic link (symlink...a shortcut) to my iCloud folder, in my home directory. This will always be present. In doing this I can launch Jupyter Lab or a Jupyter Notebook from any folder or from Anaconda Navigator and I will always see a "folder" to iCloud.

To do this you need to open a Terminal and copy and paste the statement below into the Terminal window and hit return:

ln -s ~/Library/Mobile*Documents/com~apple~CloudDocs/ iCloud

After creating this symlink, there will always be an iCloud folder that you can browse in your home directory. You can use whatever name you want by replacing the "iCloud" on the statement above with your own name.