The technical documentation staff seem to have used cut & paste in writing the instructions as to how to inhibit Edge's background activity.
The instructions for the two different Group Policy settings addressed are the same.
q.v.
"...
Find and double-click on the policy called ‘Allow Microsoft Edge to pre-launch at Windows startup, when the system is idle, and each time Microsoft Edge is closed’
Set the policy to ‘Enabled’
Under ‘Options’ you’ll see a ‘Configure pre-launch’ dropdown. Please select ‘Prevent pre-launching’
Find and double-click on the policy called ‘Allow Microsoft Edge to start and load the Start and New Tab page at Windows startup and each time Microsoft Edge is closed’
Set the policy to ‘Enabled’
Under ‘Options’ you’ll see a ‘Configure pre-launch’ dropdown. Please select ‘Prevent pre-launching’
…"
Better attention to detail in a lackadaisical world would be welcome. Eases frustration in a frustrating matter.