Whatsapp Business Api Template Message not working

WhatsApp Business Cloud API: Message Accepted but Not Delivered

I’m using the WhatsApp Business Cloud API to send a template message. The API request returns a status of "accepted," but the recipient is not receiving the message.

Request Details:

• Request URL:

  POST https://graph.facebook.com/v20.0/<phone_number_id>/messages 

• Request Body:

  {     "messaging_product": "whatsapp",     "recipient_type": "individual",     "to": "<Mobile Number>",     "type": "template",     "template": {         "name": "booking_details",         "language": {             "code": "en"         },         "components": [             {                 "type": "body",                 "parameters": [                     {"type": "text", "text": "chennai"},                     {"type": "text", "text": "salem"},                     {"type": "text", "text": "tn15505"},                     {"type": "text", "text": "star"},                     {"type": "text", "text": "23.02.2024"},                     {"type": "text", "text": "koyambedu"},                     {"type": "text", "text": "bus stand"},                     {"type": "text", "text": "10:00 a.m."},                     {"type": "text", "text": "₹5055"},                     {"type": "text", "text": "L1/S,L2/S"}                 ]             },             {                 "type": "button",                 "sub_type": "quick_reply",                 "index": "0",                 "parameters": [                     {                         "type": "payload",                         "payload": "PAYNOW_PAYLOAD"                     }                 ]             },             {                 "type": "button",                 "sub_type": "quick_reply",                 "index": "1",                 "parameters": [                     {                         "type": "payload",                         "payload": "CHANGE_DETAILS_PAYLOAD"                     }                 ]             }         ]     } } 

Response:

{     "messaging_product": "whatsapp",     "contacts": [         {             "input": "receiver",             "wa_id": "id"         }     ],     "messages": [         {             "id": "wamid.HBgMOTE4MDU2MTg1NjI5FQIAERgSMUQwQzU3MjVENDBBMEQ5NTk5AA==",             "message_status": "accepted"         }     ] } 

What I've Tried:

• Verified that the template is approved and matches the template ID.
• Confirmed the recipient's phone number is registered with WhatsApp.
• Ensured the phone_number_id and access token are correct.
• Checked that the recipient has opted in to receive messages.
• Verified there's no issue with my WhatsApp Business Account (no low-quality rating or rate limiting).

Despite the message being accepted, it’s not delivered to the recipient. What could be the reasons for this, and how can I troubleshoot or resolve this issue?