
Samsung Galaxy Tab A11+, 128 GB, Gray
Every official firmware build for SM-X230N, newest first: one row per build with all regions (CSC) that received it.
Box codes of SM-X230N for different colors and markets. Firmware is chosen by the model code SM-X230N and your region (CSC), not by the SKU.

SM-X230

SM-X238Q

SM-X135F

SM-X130

SM-X210N
You can find the firmware on the model: SM-X230N page.
Yes, all firmware files for SM-X230N are 100% official, original, and obtained directly from Samsung servers.
To flash SM-X230N, you need to download the appropriate firmware, put your device into Download Mode, and use the Odin tool to load the BL, AP, CP, and CSC files.
Downgrading is only possible if the bootloader version (binary bit) of the old firmware matches the current one. Always check the binary version before flashing SM-X230N.