This is a fairly common issue and you’re not alone! The missing Blockquote button in the Classic Editor can be hidden in the second row of the toolbar because of setting or style conflict with a theme or a plugin. On the other hand, only one row of the toolbar is shown by default. To fix this, make sure you’re in the Visual tab (not the Text tab), then look for the Toolbar Toggle button at the right of the toolbar options. It looks like two rows of small squares. Click it, and the second row of buttons should appear and you’ll likely see the Blockquote button there.
If the button still doesn’t appear, it might not be configured to show. In that case, install and activate the TinyMCE Advanced plugin (now called “Advanced Editor Tools”) from the WordPress plugin directory. Go to Settings → TinyMCE Advanced, where you’ll find a drag-and-drop editor layout. Locate the Blockquote button and drag it into your toolbar, then click Save Changes. This gives you full control over which buttons appear and where they’re placed.
If none of these steps solve it, the issue could be caused by a theme or plugin conflict. Try temporarily switching to a default WordPress theme like Twenty Twenty-Four, or deactivate your other plugins one by one while checking the editor each time. Once you identify the conflicting plugin or theme, you can either adjust its settings or reach out to its support team for help.
