Bot replys to user no problem, but when i want it to send announchment to channel or group. nothing happens

[BjarniLeifs]

I have a code, that if i interact with the bot, it will answer, no problem.
Now, What i am currently trying to do is to send message to the channels the bot is on, without interact with him.

        switch (extension) {
            case 'gif':
                if (mediaStream) await bot.sendAnimation(chatId, mediaStream, options as SendAnimationOptions);
                break;
            case 'mp4':
                if (mediaStream) await bot.sendVideo(chatId, mediaStream, options as SendVideoOptions);
                break;
            case 'jpg':
            case 'png':
                if (mediaStream) await bot.sendPhoto(chatId, mediaStream, options as SendPhotoOptions);
                break;
            case 'normalpost':
                await bot.sendMessage(chatId, captionWithCount, options as SendMessageOptions);
                break;
            default:
                console.error('Unsupported media type or no media provided');
                return;
        }

This usecase sends message to a user when user say something like example "hi" it interacts with some case of message that is finally sent with this.

However when I use a botton that say "announchment to channel" with image for example. it does not send to that channel
I have database that is holding on to my channels they are with it -100**** and he just does not send the post to it.

Can anyone help me out here?
Is there something different between user and groups?