Upgrade Win-11 Home to Pro, now what?

[king1]

In Order history the upgrade is marked as 'Complete'.
In Update History, only Cumulative Updates are listed as being installed.
Nothing showing in the spam folder.

Could the new Code be coming via Snail Mail, hence the delay?

the order history will only be referencing the order itself, the purchase, CC payments etc...

Their must be some link or reference or information somewhere on the purchase about what to do next...  have a closer look at the actual purchase documentation for a license key or link to start the process.  

Otherwise try logging into the MS account you used for the purchase and have a look at the order history
https://account.microsoft.com/billing/or...rosoft.com

Maybe there it will have a link to redeem it or the upgrade key itself...