Azure Logic Apps and Flow feature a "Send an HTTP request to SharePoint" connector.SharePoint HTTP connector
This helps a lot as it does the authentication against SharePoint for you and allows you to use the full REST API of Project Online.
The current Project Online connectors are limited and after two years still in preview. So with the HTTP connector you will have a lot of new possibilities to manipulate Project Online without writing too much code.
An intro to basic REST operations on Project Online can be found here: