Let’s say one works out in the morning, and a couple of hours later after intercourse gets into the state of Janaba, and while he’s doing Ghusl of Janaba he feels that for example in a certain area there is sweat (not liquid sweat) but he proceeds to do his Ghusl, for example a certain area is making him itchy, and he just pours water on it, does this type of sweat which is like homogenized with the skin block the ghusl?

No it doesn’t block that and the ghusl is valid.