My guess is a couple of more years before you see them out on the line based on my knowledge of flight test, certification, and production ramp up.
Tecnam took 3 years from first flight of the P2012 to FAA certification. Cape Air took its first delivery a few months later. Textron may be able to leverage its size and that fact it’s a US based company to speed up that process.
Regardless, I think it’s a sweet airplane. Hope it’s sooner rather than later that they get it out on the line. I’m assuming it will be single pilot certified but it will be interesting to see if the Feeders put SICs in them.