@Javier

At the momement.. You cannot optionally limit (or dynamically create) the choice object values.   You can “simulate” it using a lookup table.. that that may not be a good pattern for your users.

Depending on how many values .. and the screen size... you can also create single check (yes/no) and then use the “Display field only If” trigger to show or hide them..

Neither are “great” work arounds .. but work.