For Conda it is just an example that you are creating env for different python version this is very common just like Conda env control (this is mostly better on PC compare to pip if you ask me but some one like pip more).
Nein, Dorfell both tensorflow and tensorflow lite are not good for ZYNQ model load crash on either API. So it is a dead-end here at least for PYNQ 2.7 Python 3.8 No good, so don’t even try your method as I will suggest.
For weight extract Tensorflow Lite work well so quantized CNN or other network could try out I recommended this approach only. Meantime it also work well for PYNQ 2.7 Python3.8 environment so this community might try to figure out any way to make it works other than weight extracting somehow.
Enclosing a relative tutorial from mine as well about Tensorflow Lite and Overlay on CNN AXI4-Stream design.