Yes, that’s the documentation in question.
In the below suggestion, it would perhaps make more sense to explicitly specify 1 to enable and 0 to disable, rather than have an empty string.
So something like:
To set multiple install options specify “1” to enable that option, or “” to disable it. For example, to remove the legacy agent and perform a clean install but not migrate the legacy agent:
WIXUI_REMOVELEGACY=“1” WIXUI_CLEANINSTALL=“1” WIXUI_MIGRATELEGACY=“”