indeed that would be a nice feature. But to make it work, MB will be relied on have access to a database with all the radio station stream-sources out there. Keep in mind that these sources constantly keep changing due to many reasons.
To constantly keep this database / these stream-sources up to date, some folks need to constantly invest an effort into this.
I'm unsure if such community maintained global all-embracing databases with free public access exist and I also have my doubt they would be even legal.
At least there is a really cool website called ... http://radio.garden/
(Streaming) Radio stations also need to monetize their services. Surprise: People need an income!
Therefore many stations offer their streams via platforms like https://www.shoutcast.com/
What I want to say is, it might be somehow more complicated than it seems to be.