On the SharePoint Online Trigger - "When a file is added or modified (properties only)" please expose the Checked Out To property. This is a basic column in SharePoint workflows that is ciritical to determining the checked in/out state of a file.
This function is needed to overcome file lockout problem due to Office file left in locked state by user. If file is checked in it should not be locked for editing any more.
I'd like to see the CheckinComment column exposed as well. Not exactly the same, but if someone's going to add one column, just add whatever's listed in backlog and be done with it.
I'd like to see this too