Thanks @CFernandes, but your post adresses multiple connectors in a flow.
I have multiple identical connectors in Connection Management... not in the individual apps and flows.
And I even have the same app in several duplicated connectors and some cases the same flow several times in one connector.
In two Outlook connectors I got two connectors to the same flow in each... so a total of 4 connectors to the same DELETED flow.
But let's keep it simple.

If you go in on Connections "management" as I call it... and click on "New Connection"... and you connect to your outlook mail.
Now if you do this a second time you'd expect to be informed that the connection already exist.
But no... you can actually connect to your outlook mail several times... I tried 3 times... and since I already had 2 previous once I now have 5 outlook connections in the Connections management.
Is there a purpose why I can have several identical connectors?
And for me... is there a risk?