How can I add inventory report in the Shopify Flow but it's triggered by "order" not "product"

[peterman]

Here is what I have created. It now can report every sale in the Slack channel. But I also want it reports the variant's inventory number in the same report message.

for example, the original report message is:
#155555， Tom Hanks ，32.2美金，United States,
( PP3 ) T-shirts Tom,
Link to order: https://dskhfjsk.myshopify.com/admin/orders/264502398409284092

What I want to achieve:

#155555， Tom Hanks ，32.2美金，United States,
( PP3 ) T-shirts Tom, this item now has XXX units left.
Link to order: https://dskhfjsk.myshopify.com/admin/orders/264502398409284092