Customizer – Allow user editor to change website title and tagline
Use a plugin like User Role Editor to add the ‘manage_options’ capability to the specific users or their role. Of course, this will allow them to manage all options. Or add PHP code like this: $wp_customize->get_setting( ‘title_tagline’ )->capability = ‘edit_others_posts’; https://codex.wordpress.org/Roles_and_Capabilities