Hi Nestedune Amante,
Thanks for sharing the above information with us. It seems that you encounter the issue on viewing attachment in SharePoint List using Power Apps Form. If so, as our forum mainly focus on how to handle with Office 365 and SharePoint Online issue, while you are using Power Apps which beyond our support scope, and we have limited resources about Power Apps, so to further help you resolve it ASAP, we kindly recommend you go to Power Apps Community to get the dedicated assistance, the experts could further investigate your issue and provide the related suggestions. We also believe with help of Power Apps engineer‘s help, your issue will soon be solved.
Your understanding is highly appreciated.
Best regards,
Gloria