No !
as this page is written for orthers devices that use fastboot commands.
I am not sure you have to reinstall stock-samsung-android-10 as you already were on this version previously. (easier using windows Odin than Linux Heimdall)
Then compare the steps of this page
https://doc.e.foundation/devices/star2lte/install
(Just don’t care about the vendor patch that was for android-8)
To the detailed steps of this illustrated guide
/[HOWTO] install /e/ on a Samsung device from a GNU/Linux PC successfully