Yes, navigate to the Campaign Inspector in Marketing Activities, and from there you can filter down by type of smart campaign and search "Delete Person" and the resulting list will be smart campaigns containing that flow step. If you do not see the Campaign Inspector, navigate to Admin > Treasure Chest to activate it.
For some reason it doesn't work when I search "Delete person". But when searching with "Delete" only, it works and it narrows the results enough to find what I am looking for.
Thanks Devraj !