Hmmm … but there is this …
Caution: Before following these instructions please ensure that your smartphone is on the latest Android firmware available for your device. For example if available , before flashing /e/OS ‘S’ install Stock Android 12. [Snip, edit]
… complicated by …
Warning: Please note this upgrade build could not be tested as there were no device specific testers available. Some devices may need a revert to stock ROM prior to upgrade. To flash the stock ROM you would need to use a tool provided by your vendor.[Edit - split]
I have split this quote … it carries on
You may also need to download a recovery image built specifically for your device.
This is a generic warning, but in your case https://doc.e.foundation/devices/beyond2lte/install would simply have you use https://images.ecloud.global/dev/beyond2lte/ – and, yes, you would want the recovery to match your Android 12 = S build.
Sometimes the LineageOS Upgrage page offers another insight. https://wiki.lineageos.org/devices/beyond2lte/fw_update
You may want more specific advice about Samsung Stock ROM, in which case probably best to search for a more Samsung specific thread or start your own new topic / thread, I suggest.