Hi @Anonymous
It makes perfect sense. Check out the following to see if it helps you.
Let's break it down into parts:
Trigger
This one is easy. Trigger when a new item is created and send the email to everyone.

Parse the results

First, we split the results:
split(body('Start_and_wait_for_an_approval')?['outcome'],',')
and then check if there are duplicates:
union(outputs('Compose'))
Acting upon the results
Then you need to do the actions in each path. First, we check if all the replies are the same. If they are, we have:
1. All Accepted -> Send email
2. All Request for the meeting -> Send Request for meeting
3. All Rejected -> Send rejection email

length(outputs('Distinct_of_elements'))

If there is more than one element, the send request for the meeting.
Makes sense?
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Cheers
Manuel