I have an ASRock Z690 PG Velocita and in 7.62 I had access to data directly from the VRM. When I installed 7.64 these sections were missing. I reinstalled 7.62 and they came back.
I reinstalled 7.64 and I got some VRM readings but they were all over the place and incomplete, this corresponds to the debug file with the ending _7.64. After rebooting there were VRM readings that were all 0, corresponding to the ending _7.64_2.