PHPOffice/PHPWord heading tag not display in Correct font sizes in word document

[jayanorangehrmlive]

I am working in symphony PHPOffice/PHPWord document download application. I get document template from the database which has been created previously. for my sample testing I have used

php-version 7.2

input html content

<h1 style="text-align: left; background-color: #33cccc;">Heading 1</h1><h2 style="text-align: left; color: #00ff00; background-color: #ff00ff;">Heading 2</h2><h3 style="text-align: left;">heading 3</h3><h4 style="text-align: left;">heading 4</h4><h5 style="text-align: left;">heading 5</h5><h6 style="text-align: left;">heading 6</h6>

Expected behavior different heading tag h1 to h6

Received result

All above heading tags display in 14pt sizes in the downloaded document.