Would anyone of you know the format of /proc/*/environ files used in Kubernetes?

In EKS I can’t see variables, example:

root ➜ /devcontainer $ cat /proc/1/environ
-D -e [listener] 0 of 10-100 startupst

As far as I understand, /proc/*/environ file should contain a list of key=value separated by 0x00.

Example from my PC:

$ sudo cat /proc/1/environ
HOME=/init=/sbin/initNETWORK_SKIP_ENSLAVED=TERM=linuxBOOT_IMAGE=/boot/vmlinuz-6.5.0-41-genericdrop_caps=PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/binPWD=/rootmnt=/root