Return Source Back to RTE Again (ExpressionEngine 6 + CKEditor 5)

gistfile1.txt

/*
To inject JS code into CP you can use MX CP CSS & JS addon
https://expressionengine.com/add-ons/mx-cp-css-js

warning - it just a quick workaround, not a solution. You should know what you do. Good luck! :)  
*/

let btnRTE = '<div class="mx_extra"><a class="button button--default button--xsmall left show_editor" href="#" style="display:none">Editor</a> <a class="button button--default button--xsmall left show_code" href="#" >Source</a></div>';
$('.rte-textarea').after(btnRTE);
$('.grid-rte').append(btnRTE);

$('.panel-body').on('click', '.show_editor', function (e){
    e.preventDefault();
    let fieldControl = $(this).parent().parent();
    let element = fieldControl.find('textarea');
    new Rte(element.attr('id'), element.attr('config'));
    fieldControl.find('.show_editor').hide();
    fieldControl.find('.show_code').show();
});

$('.panel-body').on('click', '.show_code', function (e){
    e.preventDefault();
    let fieldControl = $(this).parent().parent();
    console.log(fieldControl.find('.ck-editor__editable:first'));
    fieldControl.find('.ck-editor__editable')[0].ckeditorInstance.destroy();
    fieldControl.find('.show_editor').show();
    fieldControl.find('.show_code').hide();
});