Hello peterkroner.
Your Line 6 Support Ticket was updated with the following message:
Hi,
Regarding Sonic Port / iOS USB-C compatibility we are currently in the middle of testing compatibility.
There are aftermarket adapters that may work, but their functions havenĀ“t been confirmed at this time,
usage would be on your own risk at the moment.
Best regards,
Technical Support
Line 6 Support Europe