There is no direct OOTB available for this but you can certainly achieve this by using Third-party tags that are set up within the 'JavaScript / Third-Party Tags’ section of the rule.
Have a look at this thread:- Best way to deploy 3rd party javascript container tag via DTM?
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Third-party tags are set up within the 'JavaScript / Third-Party Tags’ section of the rule. To add a tag / script, first, expand the ‘Javascript/Third Party Tags’ section and click ‘Add New Script’. Then, in the text box, add a name and select the script type (Non-Sequential JavaScript, Non-Sequential HTML, Sequential JavaScript). Paste or type in the desired content into the text area and click ‘Save Code’.
For more information on load order / script type, see help link here -https://marketing.adobe.com/resources/help/en_US/dtm/load_order.html
In general, when a vendor asks that their tag be placed top of the page asynchronously,create a Page Load Rule and specify it to be triggered at "top of the page " and use the container type as "Non Sequential Javascript" and it will inject the script asynchronously in <HEAD> below DTM library include script
Currently, available tools within DTM are:- Tools
~kautuk
