This is one in a series of posts on the Nikon Z7. You should be able to find all the posts about that camera in the Category List on the right sidebar, below the Articles widget. There’s a drop-down menu there that you can use to get to all the posts in this series; just look for “Nikon Z6/7”.
There is a version of Raw Therapee now in alpha testing that looks like it does a good job of mitigating the Z7 PDAF banding. I’ll let you all know when it’s available for download. It should be just a couple of days.