I have used older versions of Photoshop for years, and just installed Version 24.1.0. I always use the Hue Cube, which is the icon in the Color tab with the two overlapping squares that display foreground color in the top square, and background color in the bottom square.
There has always been a double arrow icon you clicked when you wanted to swap the colors so that the background color became the foreground color. That icon is gone, and I can't figure out how to quickly swap out the colors. Did they remove it? Or move it away from the Color tab and onto a different tab (???)