Lightroom/Camera Raw: Fuji GFX Raw File White Balance Issues - Magenta Tint

My in camera JPEG and ACR JPEG are also different, _ measure CC3 difference in mid grey, CC10 in dark grey/black

Not only can I see a difference between the embedded JPEG and the ACR JPEG, I can measure it. Top set WB off of your RAF, bottom set WB off of Embedded. There's a CC5 difference.

And I'm using PS not LR

Both RAF file's embedded preview and raw file have identical WB rendering with 'As Shot' WB when viewed onscreen and using the WB Eyedropper. I just noticed your post showing the in-camera JPEG next to an ACR generated JPEG also look identical. Are you not seeing that? If not we need to do some troubleshooting.
Do the RAF files look different when switching between the Develop and Library modules? If so try unchecking 'Use Graphics Processor' in LR Preferences> Performance tab. Do they now look the same?

LR As Shot WB Values: 5050 +17 and 5000 +17
Your meter WB: 5080 LB -10 CC 3
 I have no idea how LB and CC values are converted to the single Tint value, but it's of little concern since the actual WB rendering is correct. I also checked LR JPEG file exports and they look identical as well.

Studio sample - GFX50S - Same issue 

https://www.dropbox.com/s/huats888hifq95h/DSCF9452.RAF?dl=0

Metered K and CC values

Second sample - same target, different camera body - GFX50S this time - same issue

https://www.dropbox.com/s/05ws0q6l76pmlux/DSCF0738.RAF?dl=0

EDIT: Please provide an DNG RAF file copy with your settings applied that demonstrates the issue via Dropbox or other file sharing site. Thank you. (A DNG file export will no longer have the original embedded JPEG preview so not useful!)

The in-camera JPEG shows accurate WB, while the RAW conversion of the same file in PS shows a -k and +CC WB shift. The ACR WB shift is not dependent on any Adobe profile used, it exists on all Adobe color profiles, including the camera specific ones.
 

As already explained differences in LR WB Temp and Tint "values" are very common and not necessarily a cause of incorrect WB. The best way to determine if LR/ACR is reading and setting WB properly is to compare the RAF file's embedded JPEG preview (or an actual raw + JPEG shot) with the LR rendering of the raw image data. Below is an example using the RAF file at the link I provided.  There are slight color differences, but the WB is identical in both the embedded preview and raw data rendering in LR 8.2.1.

If you have a file that demonstrates a WB difference between the embedded JPEG or camera JPEG and LR raw data rendering then we have something for Adobe Engineering to investigate. Thank you.