Text Show More

Do you mean like this: https://jqueryui.com/accordion/?

That module is part of the default jQuery scripts for WP. You’ll need to enqueue “jquery-ui-accordion” in PHP. Also execute

$( function() {
    $( "#accordion" ).accordion();
  } );

using wp_add_inline_script() and add “accordion” as the ID attribute of the content where you want this behavior. See the first linked example’s source code for how to organize the accordion elements in HTML.