[NODE RED] Telegram notifications of entity status changes

Hi HA Community,
Newbie to HA and automation here, only discovered the whole concept about a month ago.

I have a Telegram bot which works well responding to commands but struggle to code it to send notifications of any event happening.
As an example I am trying to send a message containing the current entity status (see sun.sun example).

Does the Telegram Sender node not work without a Receiver node at all and I have to program such notification in HA without being able to use Node Red? Or is there a way to do that via a Call Service node?

Any advice would be really helpful.
Cheers.