I think it’s mapped already. I don’t have my Mixon 8 Pro anymore so I can’t confirm. If it’s not mapped you can easily map it yourself. Just let me know and I can give you detailed instructions.
You could remap the FX controls to the SHIFT layer and enable Pickup Mode. This is definitely more advanced mapping and you may find using Pickup Mode not ideal. If you don’t really use Deck 3 & 4, you could remap those EQs to control Deck 1 & 2 Neural Mix. Then you can use normal EQs and NM EQs at the same time. I’m personally used this method with 4 Deck controllers.
Please note that with these changes, you will no longer have normal EQ control on Deck 3 & 4. So, if you use these often, this is probably not the ideal layout for you.