Follow Group, PhantomCamera2D doesn't update.

[pegasusearl]

If I add all of the node to .follow_targets and have tween_on_load and auto_zoom enabled, the camera will zoom and move to be able to see all the nodes.

If I didn't add any node to .follow_targets it won't. But if I add nodes afterwards it still won't move. I expect the camera will move to follow the newly added nodes. But it is not doing that.

This is my code:
See there are two lines of await get_tree().create_timer(0.5).timeout.
If I commented these two lines, PhantomCamera will move as expected. But if I uncomment these, the node will spawn one by one and PhantomCamera does nothing.

What insert_card() does is creating Node2D then add them to PhantomCamera2D.follow_targets.

extends Node2D

@export var board:Path2D
@export var pcam:PhantomCamera2D
@export var card_visual_res:Resource
var central_point:PathFollow2D
var head_probes:Array[PathFollow2D] = []
var tail_probes:Array[PathFollow2D] = []
var head_number := -1
var tail_number := -1

func _ready() -> void:
	for obj in [board, pcam, card_visual_res]:
		assert(obj != null)
	pcam.follow_mode = PhantomCamera2D.FollowMode.GROUP
	pcam.auto_zoom_margin = Vector4(CardVisual.SPRITE_DIMENSION,
		CardVisual.SPRITE_DIMENSION, CardVisual.SPRITE_DIMENSION, CardVisual.SPRITE_DIMENSION)
	central_point = PathFollow2D.new()
	pcam.follow_targets.append(central_point)
	board.add_child(central_point)
	central_point.progress_ratio = 0.5
	for i in 10:
		await get_tree().create_timer(0.5).timeout
		insert_card(Vector2i(1,2))
	for i in 10:
		await get_tree().create_timer(0.5).timeout
		insert_card(Vector2i(3,4),false)

func insert_card(card_vec:Vector2i, in_head := true):
	var card_visual := card_visual_res.instantiate() as CardVisual
	card_visual.set_card_visual_by_vec(card_vec)
	if head_number == -1:
		central_point.add_child(card_visual)
		card_visual.rotation = 90
		head_number = card_vec.x
		tail_number = card_vec.y
	elif in_head:
		var probe := create_probe(card_visual)
		head_probes.append(probe)
		card_visual.rotation_degrees = 90
		probe.progress = central_point.progress + (CardVisual.SPRITE_DIMENSION * head_probes.size())
	else:
		var probe := create_probe(card_visual)
		tail_probes.append(probe)
		card_visual.rotation_degrees = 90
		probe.progress = central_point.progress - (CardVisual.SPRITE_DIMENSION * tail_probes.size())

func create_probe(card_vis:CardVisual) -> PathFollow2D:
	var path := PathFollow2D.new()
	board.add_child(path)
	path.add_child(card_vis)
	pcam.follow_targets.append(path)
	return path

[pegasusearl]

nvm. I misunderstand and didn't read the docs carefully
I should have used append_follow_targets(). I haven't tested to move the Node2D yet but it's good for now.