I agree with you that there is no statement on their social media that they are working with gambling sites, moreover from most people regarding Binance as a large and trusted trading site, it is very strange if Binance launches a gambling site or works with a gambling site, of course it must be watched out for with this or can find out on their social media to see the truth, is it true that Binance is working together or not !!
I don't think Binance ever need to launch a gambling platform and why would they as they are already the leading trading crypto site and gambling is totally different than trading. They can start under a new brand name but I don't think they should.
Yes they can become an official partner with any casino and they would announce it publicly once they do it but launching their own casino is something very rare to happen.