Microsoft Flow has many connectors.
One of the connectors with Triggers is SharePoint. With 7 triggers there is a nice set available to start your flows however there could be some more.
I would like to see
But there are many more triggers needed. This post will be a community driven post (so please leave comments below with your ideas).
Thanks for your feedback, the "When a site is created" trigger, "When a site is deleted" trigger, "When an item is deleted" trigger and "When a document is deleted" trigger are not supported in Microsoft Flow currently.
If you would like these features to be added in Microsoft Flow, please submit an idea to Flow Ideas Forum: