Only reference field from association can be added via layout editor without additional coding (smart field, smart collection, etc.).
Fields from belongsTo or hasOne associations can be added to the table view of collection with layout editor.
belongsTo
hasOne
Hi @Vasilii
Thank you for your feedback
We have just sent this suggestion to our product features tracking system. As you noticed, in the meanwhile, you can use the smart field feature (I added a link for further readers). We will go back to you as soon as it has been considered.