
Hi @Werner
Sorry for the delay.
It seems that APA 7th Edition meets your needs that add the site name, but these "Type of Source" options are built-in features, and this APA Citation Style is not provided via Microsoft developers in Word currentlty.
(Please Note: Since the web site above is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.)
It's recommended to upvote the thread below in Microsoft Feedback forum.
Add APA 7th Edition
Besides, I find a related thread on Microsoft Answers forum, if needed, you can have a look.
APA 7th Edition in MS Word
Hope the information could be helpful.
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