Feige already confirmed that ages ago. It's 100% R rated. Hopefully Blade will be R rated and hopefully Moon Knight will be R rated too.
They are adding the parental controls for Disney+ US, so it'll be more similar to the international ones, so I expect them to start pouring more content on the service. The most interesting question now is what will they do with Hulu? My guess is Live TV and premier AVOD with licensed content.