I just wanted to share my upgrade experience.
Device: Xiaomi 12 Pro (Zeus)
From: MIUI v14.0.18.0 (stable), TWRP 3.7.0_12 v7.9 A13
To: HyperOS v1.0.2 (stable), TWRP 3.7.0_12 v8.2 A14
Install HyperOS first: Extract xiaomi.eu_multi_ZEUS_OS1.0.2.0.ULBCNXM_os1-14.zip, boot the device into fastboot...