
Samsung Galaxy Tab S9 FE+, 8GB RAM +
Every official firmware build for SM-X610N, newest first: one row per build with all regions (CSC) that received it.

SM-X610

SM-X616N

SM-X710N

SM-X510N

SM-X620N
You can find the firmware on the model: SM-X610N page.
Yes, all firmware files for SM-X610N are 100% official, original, and obtained directly from Samsung servers.
To flash SM-X610N, 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-X610N.