be carefull : Install /e/OS on a Samsung Galaxy Tab A7 10.4 2020 (Wi-Fi) - “gta4lwifi” are instructions for users using Windows
Heimdall manage .IMG files
Thor and Odin4 manage .TAR files
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look like you want to try Galaxy-Flasher (i like it, because unlike Heimdall, it is very confortable to flash entire Firmware)
but again for single partition flash, easier is the traditionnal / historical way : Heimdall
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post #5 of the present thread contains personnalised commands to execute the corresponding steps in [HOWTO] an Unified Install Guide Project for /e/