Hi @RamonaR122 ,
I think you cannot trigger desktop flow directly when an email is received. But desktop flow can be triggered from cloud flow.
So what you can do is Create a cloud flow when an email is received then add step to Run Desktop flow.
Let me know if you have any queries.
If you like my response, please give it a Thumbs Up.
If this helps, please Accept as solution.
Regards
Kaif