Accessing Sharepoint Project (PWA) with Service principale

I have been trying to find a way to fetch all Tasks from an Enterprise Project on Sharepoint Project Online (PWA), using an app registration (clientId, secret).

Current testing from a C# net6 console app (don't want to use .net framework).

All the examples i have found using rest or csom uses username/passord, don't want to use that.

Does any know if this is possible ?