The Redmi 9 has been seen on Xiaomi’s global RF certification page, which confirms the phone exists and bears model number M2004J19G. 3C certified a couple of devices recently, one of which bears the Redmi 9 model number.
Another model,with the number M2004J19C, listed at the 3C agency comes with a 10W charger which is lower than the the Redmi 8 and the 8A which support 18W charging.
The phones will come with 4G support. A past leak showed an image of the rear quad camera which is speculated to have a 13MP main, an 8MP ultra wide and a 5MP macro cameras along with a 2MP depth sensor.
The Redmi 9 will feature a 6.6-inch screen with a Helio G70 chipset powering it. This will increase GPU performance.