### Steps to reproduce Steps: 1. Navigate to the checkbox example for either [simple tree view](https://mui.com/x/react-tree-view/simple-tree-view/selection/#checkbox-selection) or [rich tree view](https://mui.com/x/react-tree-view/rich-tree-view/selection/#checkbox-selection). 2. Run an accessibility audit using google lighthouse.  ### Current behavior Accessibility tests fail on checkboxes missing labels. ### Expected behavior Accessibility tests pass ### Context _No response_ ### Your environment <details> <summary><code>npx @mui/envinfo</code></summary> ``` Don't forget to mention which browser you used. Output from `npx @mui/envinfo` goes here. ``` </details> **Search keywords**: Tree, Accessibility