I present to your attention the Post to Telegram plugin for CMS DLE, which sends website news to a Telegram channel or group. He can either send immediately or postpone the message. And since now the Bot Telegram API cannot postpone a message directly in the Telegram channel, messages are sent via CRON.
The message text can be customized (by template). In other words, in the folder of your site template there is a post-to-telegram/send-message.tpl file that is responsible for the text of the message that will be sent to the Telegram channel. The shortcodes (tags) are the same as for the "Summary" template. That gives a very great flexibility to customize the sent message to your taste and appearance.
The plugin has its own admin panel where you can configure the plugin. I hope you find this plugin useful. Thanks for attention!