yes i have the new oneThere is no MIUI 12 ROM for Redmi Note 8T and it should be released by Xiaomi at the end of this month (if not delayed...).
Latest Stable ROM is V11.0.5.0.PCXMIXM and you can download it here (if not already installed) => https://sourceforge.net/projects/xi...files/xiaomi.eu/MIUI-STABLE-RELEASES/MIUIv11/