Hi, I understand what you're saying, but both devices have now xiaomi.eu rom, although the Mi15Ultra had originally a global rom, the mi13Pro came with chinese rom. This is not the setup I refer to. The initial setup I'm referring to, is the one on Mi15 Ultra, AFTER flashing the xiaomi.eu Rom.
After flashing, Xiaomi setup kicks in, and AFTERWARDS I'm just asked for my gmail account, but the asetup cannot find any backup on my google one to restore from, although when I check on my Mi13Pro, several backups appear (Mi10Pro, Mi Pad 7Pro... but not the ones on Mi15 Ultra)
The other way around, on the Mi15 Ultra, just appear 2 backups from yesterday's flashes, but none of the backups from my other devices. Does that make sense?
I'm not sure if I explain myself.