Hi joshbarfield,
Currently the Redpark L2-RJ45V Lightning Serial adapter is the only USB-to-Serial adapter supported on iOS.
I have captured your +1 to add support for Airconsole/Moyina USB-C adapters. We will be sure to post here if said support is implemented.
If you prefer direct email notification, send an email to
support@vandyke.com and include "***
Feature Request - Forum Thread #14522**" *in the subject line.