Shopify doesn't provide a list of all sales channels and associated IDs in their API docs.  The available sales channels can also change constantly as third-party apps can act as sales channels.

We're providing this list here for reference.  In EZ Exporter, you can find the values listed below in the source_name (Source Name) and app_id (App ID) fields of Order data.

Note that the list below is just for the more popular Sales Channels and not a comprehensive list.

Source Name/App ID	Channel Display Name
web	Online Store
580111	Online Store
pos	Point of Sale
129785	Point of Sale
shopify_draft_order	Draft Orders
1354745	Draft Orders
1780363	Google & YouTube
2329312	Facebook & Instagram
3026047	Inbox
3009811	Pinterest
4383523	TikTok
3890849	Shop
12875497473	Headless

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If you want to export channel's display name automatically based on the app_id value, you can use this formula below in the Calculated Fields:

get_attribute_value('{"580111": "Online Store", "129785": "Point of Sale", "1780363": "Google & YouTube", "2329312": "Facebook & Instagram", "3026047": "Inbox", "3009811": "Pinterest", "4383523": "TikTok", "3890849": "Shop", "241991681": "Collective (Supplier)", "1354745": "Draft Orders", "12875497473": "Headless"}', str({{ app_id }})) or {{ app_id }}