I would encourage you to check out the Custom Scripts Repository which also includes an example for calculating and visualising Carbon Monoxide.
If you require some examples on how to download individual bands, there are examples in the Documentation website, as well as details for the Sentinel-5P bands available to you from Sentinel Hub APIs.
Hi, if you have a question regarding data downloaded from the Open Access Hub, you should direct your question to their forum. Please bear in mind that the Open Access Hub is now deprecated and you should be using the Copernicus Data Space Ecosystem to access Copernicus satellite imagery.