Just read this, a run-down on Alliance's E190 plans,
https://www.executivetraveller.com/n...e-embraer-e190
First E190 not expected for entry into service until Feb 2021, despite delivery in Sept. Alliance looking at a few layout versions, most E190s will be all economy at 100 seats but some likely to keep Copa's business class cabin and some might even end up in an all-business layout similar to Alliance's Fokker 70.
Between Alliance's E190s and Rex putting B737s on the triangle, Australia's regional airlines aren't doing too bad it seems!