How to display availability as 'On backorder'?

We've enabled backorders on a product, but it's still displaying "Out of stock" next to Availability on the product page.
The backorders support page says: "Depending on your theme, customers can see On backorder for products available for backorder." - https://ecom-support.lightspeedhq.com/hc/en-us/articles/360034580953-Selling-with-insufficient-stock-backorders
Our theme is Conform Plus, which appears not to support this "On backorder" messaging. However, looking at the documentation, it's not clear which variable would be used in the product.rain template to allow this: https://ecom-support.lightspeedhq.com/hc/en-us/articles/115000277594-3-b-Rain-variables#template-pageproductrain
Does anyone know which is the correct product variable to use for this purpose?
2 comments
Just as a follow-up for anyone else looking, I've heard that the variable to use for this is: product.stock.allow_outofstock_sale
@kblaney
{% if product.stock.allow_outofstock_sale %} Seems to work!