microcode-20200520 release introduced 0x71a revision of 06-2d-07 (Sandy Bride-E/EN/EP, CPUID 0x206d7) microcode, and it may be probably enabled by default now.
Verified with microcode_ctl-1.17-33.29.el6_10.
Sandy Bridge EP successfully updated the microcode without the need for a "force" file.
The failed tasks are due to blacklisted CPUs which means they are not running the newest microcode revision. In other words, the failures are expected and a good thing since it means the blacklist is working.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.