You need to fix the UV names in the node setup, and choose Viewport Shading mode Material Preview or Rendered.
In the Shader Editor, you will see that the names of the UV maps for UV map nodes are displayed in red. That's an error and Blender tries to tell you they are invalid. Choose the correct names for the UV maps.
Nothing will change because you are still in Viewport Shading mode is still set to Solid with Color set to Texture as you can see here:
This shading mode uses the Workbench render engine which is a very simple render engine. It uses the image texture of the active Image Texture node and displays it. This causes the texture to change when you click on the nodes.
It's useful for texture painting so you see what you paint. But it also simply uses the transparency of the image - which hides the face.
To see the result of your node setup, switch the Viewport Shading mode (Z) to Material Preview or Rendered. There are also options when you open the dropdown menu right next to the sphere icons.
I've added an Area light to the scene and enabled the Use Scene Lights and Scene World options. This is the result: