Hi and welcome to the forum.
Unfortunally you can't import tickets directly via CSV out of the box. We will add the requests to our list but i dont think that we can prioritize this atm, because currently we have to focus on our paying customers and adding a general solution would take some time to implement.
But you could build upon the ticket application and add a simple CSV import that matches your needs. This could be done in 1-2h.
