...
Copy your Page ID which appeara in URL, And paste it to Page ID field in Configuration > ave Save Config
Go to the Page and clickSettings
...
Enter your Catalog ID to Catalog ID field in configuration > Save Config
Create your app
Navigate here https://developers.facebook.com/ to login to your Facebook Developers (Using your Facebook account).
...
Enter for App ID and App secret in configuration > Save Config
Set Facebook Login for your app
...
Create template mapping between Magento 2 product attributes and your product in your facebook (Instagram) store.
You can enable, disable, delete, or add new attributes of the product to map with the product’s fields on Facebook merchants.
...
Complete the payment with this product, It will track orders from Facebook (Instagram) shop.
It will track order only if there is at least one product that from Facebook (Instagram) shop.
Turn on shopping on Instagram
...