Why is 'order_status_url' unavailable in Shopify Flow?

In Shopify Flow, I am performing an “Update order note” action, stemming from an “Order fulfilled” event.

For demonstration purpose, I am updating the note with this value:

{“myOrderName”:“{{order.name}}”,“myOrderStatusURL”:“{{order.order_status_url}}”}

Shopify Flow handles the “{{order.name}}” as expected. But the “{{order.order_status_url}}” throws an error message of:

“order_status_url” is invalid. Replace this variable.

Any thoughts/tips why “order_status_url” is unavailable? A couple more I’d like to access but cannot:

{{shop.domain}}
{{order.token}}

Flow syntax for accessing variables is not the same as storefront liquid and some shortcuts that storefront offers are not offered in Flow. Use the “Add variable” link to find the field and insert it. Or look at the graphQL Admin API documentation, which has the exact paths and names