Hide devices selection from customizer?
Yes. There is a customize_previewable_devices filter which is used to manage which devices are displayed here. For example, to conditionally remove the Tablet device, do: add_filter( ‘customize_previewable_devices’, function( $devices ) { if ( ! current_user_can( ‘do_something’ ) ) { unset( $devices[‘tablet’] ); } return $devices; } );