You can wrap the two bits of information in individual <span> tags and then use style="margin-left:50px; on the second span to move it away from the first one towards the right.

Since you are using a css framework you can also use a class instead of inline style to give the second span a margin-left.

<h4 class="mb-6">
    <span>TAM: {{$label->size}} |</span> 
    <span style="margin-left: 50px;">QUANT: {{$label->quantity}}</span>
</h4>

I need to have more space between TAM: {{$label->size}} and QUANT: {{$label->quantity}} in the following code snippet:

<h4 class="mb-6">TAM: {{$label->size}} | QUANT: {{$label->quantity}}</h4>

How can I achieve this?