I found another aftermarket for the CX-3! This one is Orange Virus Tuning. They do tuning to Skyactive 2.0L and 2.5L as well as other Mazdas.
Looking at their website, I found:
"None of our products can be used at any time on any emissions control vehicle that is used for anything other than off-road performance. ALL Ecu tunes, Calibrations, flashes, files, datalogs, or anything in regard to the tune, tuning process, changes, are for OFF-ROAD USE ONLY NEVER TO BE USED ON A PUBLIC HIGHWAY."
Off-road use only?
I don't know how this is possibly of any use to most Mazda owners?