
Samsung Galaxy A23 5G
Every official firmware build for SM-S236D, newest first: one row per build with all regions (CSC) that received it.

SM-S236DL

SM-S337TL

SM-S136DL

SM-S134DL

SM-S256V
You can find the firmware on the model: SM-S236D page.
Yes, all firmware files for SM-S236D are 100% official, original, and obtained directly from Samsung servers.
To flash SM-S236D, 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-S236D.