Think of advanced recycling like LEGO. I have LEGO. I build it into a car. I have different colours of bricks as I'm putting it together.
There are multiple different technologies that will do advanced recycling. Some of them are very energy intensive but are still of lower energy intensity than virgin plastic. What chemical recycling or advanced recycling does is use indirect heat and pressure to break those bricks apart so that you can pile your red bricks, your green bricks and your blue LEGO® blocks together. At the other end, you can then take those bricks and make a flower or a house instead of a car.
While there is a breakdown of the material, we are able to say what materials are being produced, what plastics are being produced, and we manage it the same way we do any of our other chemical manufacturing processes.