Here is the roundup of the new Sony a7R IV tests with the product brochure which is available for download.

Sony a7R IV comes with a full-frame 61MP BSI-CMOS sensor with a claimed 15 stops of dynamic range (it’s the first new sensor since 2015, according to Sony). It has a 567-point hybrid AF system (with 74% frame coverage) with real-time eye, human and animal AF. The camera can shoot at 10 fps with continuous AF for up to 68 photos.
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https://www.dailycameranews.com/2019/08/new-sony-a7r-iv-tests-roundup/