Hi @juanmene18,
You need to add an HTML tag to insert the logo:
<EmailTemplate name="EmailTemplate-MyTemplate">
<Body>
<![CDATA[
<html>
<body>
<img src="https://pmaccess.rdddawul.com.sa/identityiq/ui/images/TopLogo1.png" width="131" height="131" />
</body>
</html>
]]>
</Body>
</EmailTemplate>
Also please refer the below white paper and one more chat in community website.