My ultimate goal is to get the list of all possible options of a field that the user chooses. If I can't figure out a way to get the list/record script ID, then I will do something like this. I'm not sure if there would be a limit here to how many options are returned.

const rec = record.create({type:recordType, isDynamic:true});
const field = rec.getField({fieldId:fieldId});
field.getSelectOptions();