Hello JiangJx
Tickets that you have purchased without logging in will not appear on the SBB Mobile App. You will always receive this, including the QR code, by e-mail only. When completing your purchase, always check your e-mail address to ensure that you receive the tickets. Also always check your spam folder.
In future, you will be able to buy tickets with a login. You can also log in to the SBB Mobile App. All tickets will now appear here.
If you have any further questions, please contact ticketshop@sbb.ch.
No, it is not a problem if you have reversed your first and last name. You can still travel like this.
I wish you a happy new year.
Kind regards, AferditaS