Hello,
Please note that you can find samples using all the features of phpdocx on the API pages. For example, on the img tag documentation page: https://www.phpdocx.com/htmlapi-documentation/html-standard/insert-image-Word-document-with-HTML
The following simple sample adds an SVG image transforming HTML:
$html = '<img src="https://dev.w3.org/SVG/tools/svgweb/samples/svg-files/mt.svg">';
$docx->embedHTML($html);
You can also use base64 content (all licenses) or an svg tag (with a Premium license).
As explained in our previous reply, PHP ImageMagick must be installed and enabled to add SVG content. Otherwise, SVG contents won't be added.
Regards.