It looks like Samsung forgot about the MID version of S21U for software updates for the last 2 months
I bought the s21u from the official reseller in Lebanon with MID Iraq code, the last update I got was from May
How could I flash Lebanon or UAE FW? Using Odin or smartswitch?
The instructions are in the download links that I posted in post #3.
Installing a different firmware will NOT change your phone's CSC code but simply update your firmware. Done correctly, it will not affect your data.