The Carlinkit team did tell me they're working on 2018 Accord support, but didn't give me an ETA...so guess we'll see!
Carplay2air never acknowledged their adapter is not compatible with 2018 Honda Accord Touring. They asked me to update the device to the latest firmware. Unfortunately I am unable to update to version 2.0 and the latest as I only see solid red LED with USB drive inserted.
Opened a dispute with my CC bank for this transaction.