This step is independent of your OS choice, the downloaded image can be used on any OS.
However, the image is specific to the target hardware, as its name should reflect it.
Download Lakka for generic Amlogic
Download Lakka for Khadas VIM 2
Download Lakka for Khadas VIM 3
Download Lakka for Khadas VIM 3L
Download Lakka for BananaPi CM4
Download Lakka for BananaPi M2 Pro
Download Lakka for BananaPi M2S
Download Lakka for BananaPi M5
Download Lakka for Radxa Zero2
Download Lakka for WeTek Play 2
Download links for development images: