Unfortunetely there is no way to do this, at least I haven't found it in GOdot 3.3.
You can create a dictionary variable, with your tiles as keys, and more dictionaries as values. This way You can simulate what Godot does not support, for example
var tiledata = {(0,0) : {"interaction" : ("grass","NPC"),"destructable" : true, "items" : [apple, hat]}, (0,1) : .......................