I often use “Display this column as a table” when working in Layout views. Very powerful and useful feature.
However, it is only available when “Allow multiple selections” is enabled in the Lookup column. This makes sense if you think that tables are only useful when they have more than one row.
But you would be wrong about that! Single-row tables are a great way to show a few extra properties of a looked-up row.
Could you just pull those properties into columns of the layout’s row? Sure - but not while preserving editability.