WhatsApp broadcasts act a little differently than Telegram channels; they end up as normal messages in a 1-on-1 chat with each recipient (with a megaphone icon

WhatsApp broadcasts act a little differently than Telegram channels; they end up as normal messages in a 1-on-1 chat with each recipient (with a megaphone icon next to it), so it's not something you can join or even have as a separate section. WhatsApp groups can be set to act like channels, however, by changing permissions to allow just group admins to send messages.