You will need to run a flow that lists all the items created on that day and then compare the creating by column to a list of list of operators with a condition that check to see if the operator is in the return result.
It wil be something like this.
Schedule Trigger
get items operators
get items check list (use filter to return today only)
for each operator if that are in the string(outputs) of get items check list the do nothing other wise send an email.
