Yes, the Canon EOS R6 Mark II is compatible with the ProGrade Digital V60 128GB SD.
ProGrade Digital V60 128GB SD is V60 class. Meets the floor for: 4K30 (30 MB/s floor); 4K60 (60 MB/s floor). (Peak write 130 MB/s is not evidence of sustained performance; the V60 class rating above decides this.)
“IPB (Standard) UHS Speed Class 3 or higher Video Speed Class V60 or higher -- Canon EOS R6 Mark II 4K UHD 59.94/50.00 fps card performance requirement.”
Last verified:
Compatibility inferred from spec rule (citations above are manufacturer-verified)