Adobe updated the iOS versions of Lightroom CC tonight and in the description it states "Integrated ACR 10.1." Assumes that means we should see Adobe Camera Raw updated for the desktop apps very soon.
Yes, this camera model is supported in Camera Raw 10.1, released yesterday.
I can confirm I just updated Lightroom Classic CC to 7.1 release with camera raw 10.1
A7Riii raw is now supported
I just tried it and now no images are viewable .. great!
Woo Hoo!! Thanks for the update.