Children are not added

Global.gd

@@ -50,12 +50,13 @@ func RemoveScene(scene):
 	var camera = get_node("/root/base_scene/Camera2D")
 	camera.remove_child(scene)
 	
-func AddMap(mapname):
+func AddMap(load_on, mapname):
 	var maps = load(mapname).instance().get_children()
 	for i in maps:
-		print(get_tree().get_root())
-		get_tree().get_root().add_child(i)
+		load_on.add_child(i)
 		print('Added ', i)
+		for _i in self.get_children():
+			print("Nodes visible at addMap ", _i)
 
 #Go to scene by name
 func GoToScene(scene):

MiscCodes/Menu.gd

@@ -9,4 +9,3 @@ func _on_Btn_PlayGame_pressed():
 
 func _on_Btn_LoadGame_pressed():
 	Global.GoToScene("loadgame_screen")
-

MiscCodes/Tilemap_CameraView.gd

@@ -5,6 +5,11 @@ onready var player = get_node("/root/base_scene/Player")
 onready var background_map  =  get_node("/root/base_scene/background")
 onready var screen_size = self.get_viewport_rect().size
 
+func _init():
+	var map_name = "res://Maps/river_intersection.tscn"
+	print(self)
+	Global.AddMap(self, map_name)
+
 func _ready():
 	var map_name = "res://Maps/river_intersection"
 	calculate_bounds()
@@ -22,7 +27,7 @@ var max_y_pixel = 0
 
 #function that calculates the borders/bounds of the map
 func calculate_bounds():
-	for _i in self.get_parent().get_children():
+	for _i in self.get_children():
 		print("Nodes visible ", _i)
 	var used_cells = background_map.get_used_cells()
 	for pos in used_cells:

Other/base_tilemap/init.gd

@@ -1,8 +1,18 @@
 extends Node2D
 
-func _init():
-	var map_name = "res://Maps/river_intersection.tscn"
-	Global.AddMap(map_name)
+#func realize():
+#	print("At ready")
+#	for _i in self.get_children():
+#		print("Nodes visible at init  ", _i)
+#
+#func _init():
+#	var map_name = "res://Maps/river_intersection.tscn"
+#	Global.AddMap(self, map_name)
+#	realize()
+#
+#func _ready():
+#	realize()
+
 #	for _i in self.get_children():
 #		print("Nodes visible ",_i)
 #		if _i is TileMap: