Typing indicators now work on RCS, WhatsApp, AMB

<p>New Unified Typing Indicator API experience:</p> <p>You can now send typing indicators across RCS, WhatsApp (WA), and Apple Messages for Business (AMB) using a streamlined consistent integration with JSON payloads.</p> <p>Smart Channel Behaviors:</p> <ul> <li>RCS: Displays a typing indicator for up to 20 seconds (or until the message delivers) to reduce perceived wait times.</li> <li>WhatsApp: Automatically marks the referenced message as read and displays the indicator for up to 25 seconds (or until delivery) using the required messageId.</li> <li>Apple Messages for Business (Private Beta): Support for Typing indicators is available! Please note that AMB access is currently restricted as it is in private beta. How to use typing indicators on AMB is available in our beta documentation.&nbsp;</li> </ul> <p>💡 Need more time? For longer workflows, you can send additional typing indicator requests to extend the duration before the default timeouts hit.</p> <p>&nbsp;</p> <p>See our public documentation here:</p> <ul> <li><a href="https://www.twilio.com/docs/rcs/send-an-rcs-message#send-an-rcs-typing-indicator"&gt;RCS&lt;/a&gt;&lt;/li> <li><a href="https://www.twilio.com/docs/whatsapp/api/typing-indicators-resource#send-a-typing-indicator"&gt;WA&lt;/a&gt;&lt;/li> </ul> <p>&nbsp;</p>