I wouldn't necessarily call those functions an Adobe Acrobat DC commands.
In MS Office 365 this is an integration of Adobe PDF services that are made available to the users.
This additional capabilities were added to the Adobe PDF Maker toolbar ribbon of MS Office .
So what the add-on allows to do now in MS Word is basically to save the file and perform an export to PDF directly from MS Word.
Now, the second part to that action invokes the Adobe Sign tool which allows to send the document out to collect signatures from recipients.
The resulting integration of these service is part of a partnership between Micrososft and Adobe back in 2018.
And to answer specifically the last part of your question, yes they do more now, as it allows the user to keep their fonts, layouts and password protections, and also extending these online services to the web app versions of MS Office, Sharepoint, OneDrive, and MS Azure, access customer information from LinkedIn, add info from business cards to your contacts, use of the Adobe Scan app, convert different file formats into a single PDF, and/or convert PDFs to editable MS Office documents