Some nodes may not be displayed in the tree. This is usually because their dependency condition is not met. For example, a child node is hidden because the parent node has not been enabled.
To toggle the visibility of these nodes, click the Show Hidden Items button, located on the far right of the nRF Kconfig search bar.
After toggling the hidden nodes on, the icon changes to Don't Show Hidden Items. Click on it to stop showing hidden nodes.
Note
Nodes that are hidden cannot be edited.