Save images to SharePoint library is not supported in PowerApps currently. Please check this similar thread:
May I suggest you use Microsoft Flow? You could create a flow which is triggered by a button and followed by an action “send email” or “create file in SharePoint”. Please check this article for a reference:
Thanks for your feedback. I test this issue on my side also, I get the same result with you. When I click the button to run the flow, in the Email and SharePoint library the file is incorrect format, and the files cannot be displayed.
I will report this issue from my side.
Any news on this ? I'm looking for any way to upload pictures to a sharepoint library, and, using Flows, I have exactly the same issue
PGs are investigating this issue, I’m not sure with the timeline.
I will keep an eye on this issue and back to you once I got any response.
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