Relationship field
The Relationship field allows you to select and sort multiple items from a list
Related plugins
Entity Field
by Oblik Studio
Allows you to add other fields to it with the intention of scoping them. It works like a Structure with one entry but with much cleaner UI.
Accordion Field
by oweb studio
Collapses the content below headlines in Panel for Kirby 3.
Table field
by ragi96
Use the table field plugin to provide an easy way for editors to create and edit tables