Why does some systems on RHEL8.5 show “intel_cpufreq“ as scaling driver instead of “intel_pstate“ in the output of “cpupower frequency-info“?

Issue

• Why does some systems on RHEL8.5 show intel_cpufreq as scaling driver instead of intel_pstate in the output of cpupower frequency-info?
• When system is booted with RHEL8.4, intel_pstate gets loaded, while when same system booted with RHEL8.5 kernel, intel_cpufreq driver is seen to be loaded.

analyzing CPU 0:
  driver: intel_cpufreq
  CPUs which run at the same hardware frequency: 0
  CPUs which need to have their frequency coordinated by software: 0
  maximum transition latency: 20.0 us
  hardware limits: 1.20 GHz - 3.00 GHz
  available cpufreq governors: conservative ondemand userspace powersave performance
  current policy: frequency should be within 3.00 GHz and 3.00 GHz.
                  The governor "performance" may decide which speed to use
                  within this range.
  current CPU frequency: Unable to call hardware
  current CPU frequency: 2.30 GHz (asserted by call to kernel)
  boost state support:
    Supported: yes
    Active: yes