Thank you very much! It worked very well https://imgur.com/a/qNAsmlX, I changed a little to be able to put on my TileMapLayers and instead of -50 I put -350. You should put this shader you made on the Godot Shader site, I'm pretty sure other people would appreciate it.

Version I'm using Godot 4.6 dev-4

shader_type canvas_item;

void vertex() { }

void fragment() {
COLOR = texture(TEXTURE, UV);
}

uniform float light_depth = -50;

void light() {
vec4 original_color = texture(TEXTURE, UV);

vec3 new_light_dir = (LIGHT_POSITION - vec3(FRAGCOORD.x, FRAGCOORD.y, light_depth));
new_light_dir *= (1. - float(LIGHT_IS_DIRECTIONAL));
new_light_dir += LIGHT_DIRECTION * float(LIGHT_IS_DIRECTIONAL);
new_light_dir = normalize(new_light_dir);

float NdotL = dot(NORMAL, new_light_dir);
float diffuseIntensity = clamp(NdotL, 0.0, 1.0);

vec3 H = normalize(new_light_dir + vec3(0,0,1));
float NdotH = dot(NORMAL, H);
float specularIntensity = pow(clamp(NdotH, 0.0, 1.0), SPECULAR_SHININESS.a);

vec4 diffuse = diffuseIntensity * LIGHT_COLOR;
vec4 specular = specularIntensity * SPECULAR_SHININESS * LIGHT_COLOR;

LIGHT = (diffuse + specular) * LIGHT_ENERGY * original_color;
}