The "Recent Uploads" section is in the popup for file attachment in an Issue. All sources had guided me to Space Tools in Confluence. I couldn't find anything related to deleting files in Jira Software (Cloud). I had already enabled permissions for attachments and deleting attachments.
By the way, this is not related to deleting attachment from Issue. This is specifically on deleting uploaded files shown in "Recent Uploads" of the attachment popup.
Looking forward to viable assistance, thanks in advance!