Share Point Online List Lookup column?

Hi, I have a problem,

I have several selection columns in a list article like "unit of measure".

I want to have this look up as a lookup column based on articles in another list (lookup).

However, this column is not displayed to me.

possible idea? I create in article an extra text column unit of measure as text and referenced on the selected value just this selection column? like = amount or so.

Please help me!