How to achieve glow effect in 2d environment?

Godot Version

4.6

Question

i tried to follow a youtube tutorial but i only got this result:

when i increase the hdr value in the visibility modulate settings, it only glows “internally” but there’s no light bleeding outside it like a real “glow”.

i already turned on hdr 2d in project settings, already have a worldenvironment node on my rootnode with glow enabled and screen blendmode and hdr threshold default at 1.0, and im also using Forward+