GNU Radio Companion: No Module Named iio; import iio shows fine

Question

I have been working to install GRC on my Windows 10 hosted, VMWare Ubuntu 20.04 machine. I have tracked my efforts here: Ubuntu 20.04 Could NOT find MPIR during gr-iio cmake. After much trouble, I was able to install GRC 3.8 with dependencies and cmake files built with no errors.

In my .bashrc file, I set my paths to the following:

export PYTHONPATH=/usr/local/lib/python3/dist-packages/gnuradio:/usr/local/lib/python3/dist-packages:/usr/lib/python3/dist-packages/gnuradio:/usr/local/lib/python3/dist-packages/iio:$PYTHONPATH
export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH

After refreshing using: . ~/.bashrc I launch GRC from the terminal and I am showing missing blocks for QT. I notice my block paths are:

Block paths:
    /usr/local/share/gnuradio/grc/blocks

BUT, when I launch GRC from the application launcher I am able to see my QT Blocks. The block paths now show:

Block paths:
    /usr/share/gnuradio/grc/blocks
    /usr/local/share/gnuradio/grc/blocks

But, that's just one mystery. Another is the failure to import iio for ether method of launching. In GRC, I get the following error:

ModuleNotFoundError: No module named 'iio'

However, when I take to terminal and type python3 and then import iio I get a return character.

What's going on here?