Why the value of kernel.pid_max is seen as 4194304 on systems of RHEL8 and later?

Issue

• After updating to RHEL8.2, the value of pid_max after every reboot is seen as 4194304, why?

# sysctl -a|grep pid_max
kernel.pid_max = 4194304

• If RHEL7 is installed on the same server, the value is seen as 32768 for same number of cpu's.

• On RHEL8, journal logs show the pid_max value as 32768, but how the value gets changed to 4194304.

kernel: pid_max: default: 32768 minimum: 301