To Find a Telegram channel, you can search on Google for “Telegram directory”
In Telegram directories, you can find a list of Telegram channels.
One of websites that listed a lot of Telegram channels by categories is: www.telegramdirectory.me
There’s a lot like this directory.
You can find and subscribe to your favorite channel by business type and country.
You can register your channel in the list of these websites and get a new member.