In PS CC some of the icons are missing in the layers panel. See attached screen shot. This is on a Windows 10 OS, Adobe Photoshop Version: 21.1.3 20200508.r.190 2020/05/08: 73760933ad5 x64. Can someone please help me find these icons? It's very irritating not having them. Thanks!
The "X" to close the panel is also missing. Go to Prefs > General > Reset Preferences on Quit. Back up any customization first, such as actions, swatches, etc.