Will Allah forgive saying that something that is haram is halal?

Assalamu Alaykom If someone who used to say that homosexuality is halal to others, but they grew up and repented and now they know that it is haram and they regret ever saying that it is halal, will Allah forgive them? That person was heavily misguided and badly influenced by a circle of friends with whom they stopped talking to and hanging out with it. That person knows that it is haram and that it is a major sin but they used to say that it is halal. Does Allah forgive that?