So I found the issue with the "missing" share option in the Windows app. In the blog entry about this new feature, it shows using the web browser version of 1Pass without specifically mentioning that is the case (and I did not recognized that fact). So I was looking for the vertical ellipse / share menu/ share option in the Windows app as shown in the blog’s video, and of course that does not exist. I did not think to right click an item, and that action is not mentioned in the blog entry. But the right click does indeed present the share option, and choosing it does then drop the user into the browser version of 1Pass to complete the sharing operation.