There is a list of archives of Samsung stock ROMs here Know your hardware - Samsung.
I know of no Official Samsung source of Stock ROMs.
Edit. It is also worth considering how new your device actually is.
Flashing /e/OS to a brand new Samsung
The 7-day buffer period discussed in this section will impact users of a brand new phone. During the Prenormal period, you can NOT flash any non-Samsung binaries. It would be a good idea to use the phone with a SIM card and online with wifi during this period. Source Know your hardware - Samsung Of course in the case of a WiFi tablet SIM does not apply, but connection to Remote Monitoring is still a factor.
You need to ensure the device is on Android 12 (not Android 13) before attempting to install e-1.9-s-20230311268558-dev-gta4xl.zip
Perhaps you could clarify … is the loop to Odin / Download mode only, or something else.