I have noticed that the attachments window is only visible during a ticket creation in the portal. You can find the attachments windows either by using it on the work doc view or in the forms.
However after that, once the Request has been created, this useful "attachments window" completely disappears.
If a customer wants to add new attachments he/she must do so via a comment. At which point the attachment will only show up in that specific comment.
When reaching out to atlassian support however (they also use a slightly altered version of JSM), they themselves have this extremely useful feature. You can add new Attachments at the top of the request and also see a list of all previously attached files.
Is there already a ongoing change request about adding this attachment to JSM for the rest as well or will this basic functionality be gatekept from us. In my opinion if Atlassian support themselves are benefiting from this feature, why not relesase it to the public?
Attached you will find a screenshot of the "Wattachment window" that Atlassian Support use: