When you add up the percentage of users with Android 10 and lower what do you get? 75.7%
So @gogocar62 is correct to say
Maybe you should be the one to get your facts straight. And maybe improve your comprehension of English ;)
Yes, for as long as you see "fastboot" in the downloaded rom file name.
If a new version is available, you can download and flash the new rom if you want to.
No you don't have to
You could simply post the version number. Much more straightforward that way.
The problem is you need to find a TWRP that is compatible with your current rom version.
You should read post #2 to understand why you can't modify /system
So if you can be more specific about why you want to achieve , then i may be able to help
What version of miui 12.5 did you have
Stable or weekly?
Stock or Xiaomi.eu?
What version of miui 13 are you trying to install
Stable or weekly?
Stock or Xiaomi.eu?