Shader Sprite/diffuse add shadow on spotlight

Hello, i use sprites/diffuse shader without sprite renderer.

But i can't achieve shadow under spotlight.

There is the built-in shader:

 Shader "Me/Sprites/Diffuse"
 {
     Properties
     {
         [PerRendererData] _MainTex ("Sprite Texture", 2D) = "white" {}
         _Color ("Tint", Color) = (1,1,1,1)
         [MaterialToggle] PixelSnap ("Pixel snap", Float) = 0
     }
 
     SubShader
     {
         Tags
         { 
             "Queue"="Transparent" 
             "IgnoreProjector"="True" 
             "RenderType"="Transparent" 
             "PreviewType"="Plane"
             "CanUseSpriteAtlas"="True"
         }
         LOD 200
         //Cull Off
         //Lighting On
         //ZWrite Off
         //Fog { Mode Off }
         Blend SrcAlpha OneMinusSrcAlpha
 
         CGPROGRAM
         #pragma surface surf Lambert addshadow alpha vertex:vert 
         #pragma multi_compile DUMMY PIXELSNAP_ON
            #pragma multi_compile_fwdadd_fullshadows
         #include "UnityCG.cginc"
         #include "AutoLight.cginc"
         sampler2D _MainTex;
         fixed4 _Color;
 
         struct Input
         {//
             float2 uv_MainTex;
             fixed4 color;
         };
         
         void vert (inout appdata_full v, out Input o)
         {
             #if defined(PIXELSNAP_ON) && !defined(SHADER_API_FLASH)
             v.vertex = UnityPixelSnap (v.vertex);
             #endif
             v.normal = float3(0,0,-1);
             UNITY_INITIALIZE_OUTPUT(Input, o);
             o.color = _Color;
         }
 
         void surf (Input IN, inout SurfaceOutput o)
         {
             fixed4 c = tex2D(_MainTex, IN.uv_MainTex) * IN.color;
             o.Albedo = c.rgb;
             o.Alpha = c.a;
         }
         ENDCG
     }
 
 Fallback "Transparent/Diffuse"
 }

I need help. Thank you.