Following months of speculation, the existence of the Samsung Galaxy M30s as a retail product has been confirmed. It may be exclusive to Amazon India, a site that is currently promoting it as a device with an impressive 6000mAh battery. This new Galaxy M-series variant will go on sale on September 18, 2019.
https://www.notebookcheck.net/Get-ready-to-meet-Samsung-s-new-battery-monster-the-Galaxy-M30s.434761.0.html
So since it is AMOLED, I hope it has Always on Display.
Having read GSMA's ROGPII review, THAT looks like the real beast.