Why does some commonly used perf counters show "not supported" for 3rd Gen Intel Xeon processors or IceLake family cpus on Red Hat Enterprise Linux 7.9?

Issue

• Why does some commonly used perf counters show "not supported" for 3rd Gen Intel Xeon processors or IceLake family cpus on Red Hat Enterprise Linux 7.9?

# perf stat -ddd
 Performance counter stats for 'system wide':

         61,407.34 msec cpu-clock                 #   55.799 CPUs utilized
               572      context-switches          #    0.009 K/sec
                82      cpu-migrations            #    0.001 K/sec
               273      page-faults               #    0.004 K/sec
     1,303,252,602      cycles                    #    0.021 GHz
       321,695,064      instructions              #    0.25  insn per cycle
        71,694,588      branches                  #    1.168 M/sec
           465,244      branch-misses             #    0.65% of all branches
   <not supported>      L1-dcache-loads
   <not supported>      L1-dcache-load-misses
   <not supported>      LLC-loads
   <not supported>      LLC-load-misses
   <not supported>      L1-icache-loads
   <not supported>      L1-icache-load-misses
   <not supported>      dTLB-loads
   <not supported>      dTLB-load-misses
   <not supported>      iTLB-loads
   <not supported>      iTLB-load-misses
   <not supported>      L1-dcache-prefetches
   <not supported>      L1-dcache-prefetch-misses

       1.100512375 seconds time elapsed