Tracking_company list - Does it exist?

Looking at previous discussions it would appear that there is no list of valid tracking companies. However the documentation indicates that there is such a list

If you are creating a fulfillment for a supported carrier, you can simply send the tracking_company, and tracking_numbers and Shopify will generate the tracking_urlfor you. If creating a fulfillment for an unsupported carrier (not in the tracking_company list) send the tracking_company, tracking_numbers and tracking_urls fields.

Should I believe the documentation or should I believe previous discussions on this issue ? ( I don’t know which is most recent. The previous questions or the documentation)

Maybe I am asking the wrong question. Is there a list of "supported carrier"s ?

For anyone else who finds this. Go to this page and scroll down slowly from the top. You will shortly find the list. I missed this and was also annoyed to find there is no direct link to this list. https://shopify.dev/docs/admin-api/rest/reference/shipping-and-fulfillment/fulfillment

Yep, click this link to view the list:

https://shopify.dev/api/admin/rest/reference/shipping-and-fulfillment/fulfillment#tracking-company-property-2021-07

for anyone still stuck… click ‘show hidden fields’ within the Fulfillment Object section, then click ‘show tracking_company properties.’

These docs are getting worse. It’s in the “Show 5 hidden fields” of the fulfillment resource

https://gyazo.com/7efb707f29bc4c7caf85639f6ce3f17e

It is not distinct list of tracking companys.