There are very prominent equivalents of Fabrizio Romano in other sports, especially in America, who are highly paid information brokers and have television jobs
specifically because of their connections within their respective sports and being in touch with agents and putting out whatever info they've been fed. Often teams feed them information directly as well.
Not sure what any of that has all to do with African and Asian fans of big 6 clubs whatever the heck that means
People can feel however they want about him but that doesn't change the fact he does have actual sources around the game, has professional players getting news from him and clubs around the world collaborating with him regularly.
He's made quite a good niche for himself but it's nothing new, that sort of role exists in every sport nowadays and he learned from a prominent mentor in Gianluca Di Marzio.