On the Download screen it says OEM Lock: ON
In the video - Samsung - Galaxy Tab S6 Lite (Wi-Fi) - gta4xlwifi - Documentation Suggestions - #4 by Pierro - around the 12+ minute mark it shows going into Download mode but holding the Vol Up button to go into Unlock and then rebooting to double check the OEM Unlock. When he did this and went back into Download mode the screen showed OEM Lock: OFF and his Recovery step then worked.
I am nervous about this and would love some verification regarding the step of pushing and holding the Vol Up button to Unlock vs just continue?