DVB-T2 Stick - lsusb:
ID 0572:c688 Conexant Systems (Rockwell), Inc. Geniatech T230 DVB-T2 TV Stick
This stick seems to be unsupported in your built (LibreELEC-Odroid_C2.arm-rb-leia24.img.gz), right?
Then it would not be worth to search for a solution.
EDIT: Just found out that DVB drivers are available as installable modules. Just selected (in my case) "crazycat" drivers in the addon "LibreELEC Module Drivers".