just a qick update to say i have found this article on radio.cos blog about tunein.com
At present, Tunein.com are not accepting new radio station submissions from any provider. We are unsure as to the reasoning for this and have reached out to Tunein.com for comment. Once we receive further information radio.co will update this article.
However, existing radio stations can be updated to change things like name, icon, and stream URL. If you are updating your existing station on TuneIn then be sure to double check this guide. at radio.cos help center