There was no nudity in Uncut Gems. Julia Fox has a pretty hot scene in her lingerie just over half an hour into the film however.
There also wasn’t any really nudity in Waves. Just over 100 minutes in, Taylor Russell is lying on a bed during a sex scene. Taylor is topless but covered by a guy on top of her and a blanket. Eventually the blanket moves briefly and you can see most of her right breast. The scene is pretty dark however and it seems one of the tassels attached to the end of the blanket covered most of her nipple.