Select multiple features and show them when clicking a property using a custom widget.

[RomaGSYS]

Hi, I want to show multiple fields in a custom widget when a property of a map is clicked, I have been trying to do it, but it just selects one random field, I do not know why if I have multiple fields selected, I cannot see them at the same time.

As we can clearly see, I have multiple fields selected, but when I click on a property of a map, it just shows one.

Thanks in advance,

Romà