Smart link embeds: why can't I edit my embedded document?

[Farheengani]

Hi! I recently added a few smart links to my Trello board. These are Google documents I've added in the "Embed View". But for some reason, I'm not able to edit these documents from Trello itself. It says on Atlassian's documentation that embedded smart links can be edited from the app itself. So why is this feature not available for me? Please help. 

P.S. I am actually writing an article about using smart links in Trello and want to make doubly sure I understand smart links correctly. Thanks in advance. 

Related question: which apps allow smart links to be displayed in embed mode? As in, which apps allow users to make changes to a document or a file in another app, within Trello? Can someone from the Trello team please provide a quick list? Thanks.

[Farheengani]

Related question: which apps allow smart links to be displayed in embed mode? As in, which apps allow users to make changes to a document or a file in another app, within Trello? Can someone from the Trello team please provide a quick list? Thanks.