Unit pricing data

So I essentially have the below setup using unit pricing. In an ideal world I’d hide the quantity badge but unfortunately that isn’t possible. So to try help making it clearer in checkout I thought about adding another line at the end of the line item saying something like:

Total Length: 0.25m

But unfortunately it appears we don’t have this data available in useCartLines. I don’t want to have to do an API request either as that’ll result in flashing content.

I thought about using Flow to get this data into a metafield but there isn’t any suitable triggers that I’m aware of to handle this.

Does anybody have any suggestions as to how I can achieve this?

Reference:

useCartLines - Cart Lines