Is it possible to find the complete command list to be executed in a sub-shell?

I face a situation that features Bash scripts on a Linux installation that asynchronously run system tools with a delay, via a

-bash
( sleep 10 ; some_command ) &

construct. The scripts that perform these delayed commands cannot be changed, and they are triggered by system processes outside my direct control. I need to detect this some_command "about to happen" from another bash script. The name of the command is one of a few known alternatives (e.g. systemctl), and I only need to detect if it has been scheduled to run after the timeout implemented by sleep. I can identify any "active" sleep calls via ps and from there on their parent PIDs. However, the parent PID belongs to the script featuring the sub-shell call, not the sub-shell itself. Is there any way to retrieve * the PID of a sub-shell by knowing the currently running command (in this example, sleep), and from there * the complete command-list passed to that sub-shell with command-line tools?