Centre quantity selector on Prestige theme

I am trying to centre the quantity selector on my store and I am using the Prestige theme. I have managed to centre everything else (title, price) but I am assuming this requires some specific code. Any help would be appreciated.

Go to Themes> Customize> Product Template> Product Information “Block”> Custom CSS> Add This Code

.quantity {margin: 0px auto;}
.quantity__label {text-align: center;}

Example:

Hope that works for you!
@biznazz101

@wattsga You can try these steps to achieve your result
Go to theme → click edit code-> go to theme.css file then add the following code

.product-info__block-item{
  text-align:center;
}

Result: