It showed update MIUI 13.0.5 about 440MB (update notes said, security update and bug fixes and optimisation), I charged the battery to ~90% and updated. Right after that another update MIUI 13.0.2 about 2.8GB (notes said Android 12 and August security update). Version number suggested downgrade. I updated, it took some time to complete.
Uninstalled about a dozen apps which I felt won't be needed and about a handful of apps we don't need but couldn't uninstall. They are moved to hidden apps. Including hidden there are 34 apps now out of which 10 are uninstallable but I am keeping them as they could be useful sometime if not every day.
Mostly things are familiar and some new features (vs Redmi 4)
There is no screen on time tracker since last charge, but there is for daily SOT. And there is also time on battery since last charge (90%+)
Turned on some suggested battery optimization, and ignored few like 60hz refresh, lock screen after 15 sec and dark mode.
Didn't add google account, so Chrome is not updating as it needs Google play store logged in. It has to wait until the phone gets to my Mom's hands.
Leaving the colour scheme to default as it looks better than saturated and standard.