Hi @AndyDo ,
Thank you for your question.
Canvas apps in offline mode don’t support files or images. However, there are workarounds to this limitation. You can save attachments locally during offline mode by using the SaveData and LoadData functions in PowerApps.
Another workaround is to create a custom container with a camera control and an image upload option. You can store the content string from both in a collection and use Flow to add the data to SharePoint or CDS when the application is live again.
It’s also possible to create an attachment control for a canvas app by using an edit form with a SharePoint connector as the data source. One of the fields will be an attachment control that allows users to upload files.
I hope this helps! Let me know if you have any further questions. If this solves your question, please accept it as a solution & give it a thumbs up.
Best regards,
Sohanur Rahman Sohan