The previous options didn't work for me but instead I was able to copy from one jupyter notebook (.ipynb) to another using the VSCode (Visual Studio Code) platform and on to do so I:

1. Highlighted the cells of interest (with Shift + Select the First Cell, then while scrolling to the last cell of interest and pressing Shift + Selecting the Last Cell)
2. Copied the Highlighted cells (Ctrl + C)
3. Went to the destination Jupyter notebook and pasted the copied cells (Ctrl + V)