Can I pass HTML markup as the content for a LWC slot when used in an Aura component?

Currently I have a LWC that has a <slot> inside of it to allow content between the tags. To test said component, I wanted to spin up a scratch org and quickly create a component. Since we can’t create LWC inside the console, I created an Aura component instead.

The markup is similar to this:

<aura:application extends="force:slds">
    <div class="slds-box">
        <c:tokenLocker recordId="5001A0000000000AAA"
                       passTokenToCallbackClass="true">
            <h1>Hello world!</h1>
            <p>Lorem ipsum, dolor</p>
        </c:tokenLocker>
    </div>
</aura:application>

When the LWC tokenLocker displays the content, I simply get an empty div on screen, and no content is displayed at all.

I looked into the LWC documentation and found that in the section “Pass Markup into Slots” there’s this note right at the beginning of the document:

You can’t pass an Aura component into a slot.

I understand that it is not possible to pass an Aura component, but is this valid for simple HTML tags too?