I am not sure if I understand your request correctly, sorry. If I am missing something, please explain what exactly you would like to do, but:
1. Make the beautypass have the lighting adjustments I've made in the lightmix
You can use the ">Scene" button for this in the LightMix tab of the VFB. This will bake all LightMix settings into the actual scene lights. You need to re-render to see the result in the Beauty pass.
2. Apply denoise to the lightmix.
This is available out of the box when setting up LightMix. You can specify whether to enable denoising or not. There is also a checkbox for this in the LightSelect elements.
Of course you need to have some denoiser enabled for this to work.
When saving my lightmix i do not have denoise on it but when using the beauty pass it does not have the lighting I made in lightmix.
I don't understand this part, sorry.
When you are saving your LightMix - do you mean your LightMix element in the VFB and saving it as an image file? Or do you mean the CONF file? Or something else...?
Beauty pass does not have the lighting set up from LightMix - this is expected: LightMix is LightMix, Beauty is Beauty. You can bake the settings from LightMix to Beauty using the ">Scene" button as I explained above.
Hope that helps!
