I see no point in posting through a bot if you have a hive account!
Another thing is the contingent of telegram communities, but which do not have an account yet!
I see the bot more as an opportunity to monetize the content of the thematic telegram channel (any topic can be)
A bot with which the admins of the telegram channel can post the selected content of the channel to the hive

For example, from the entire content of the telegram channel, the admin selects a high-quality grow report and using the bot command publishes this material to the hive account created by the bot special for this telegram channel ... (or you can link an existing hive account to broadcast content from telegram)
The TG channel admins either distribute the profit among the content creators in the chat, or use it to develop the channel ... at their discretion.
Just a telegram bot that you can add to your TG channel if you have one

Regarding the creation of promotional content, you'd better consult with the channel moderators.
One head is good, but together you can create really worthwhile things.