Hi,
I am submitting an image from PowerApps into a SharePoint document library, the image saving is working great but I am trying to capture the value of a Date Picker and update a column within the document library. I am calling a Flow that does the image save to the document library then does a file properties update which I was hoping would update a column called "Date" with the value from the PowerApps date picker.
I am calling Flow with the following:
MileageRecord-MileageImageUploadtoDocumentLibrary'.Run(varUser.FullName & "- Start - " & date_newrecordday_date.SelectedDate & ".jpg",varStartDayMileageBase64Only, date_newrecordday_date.SelectedDate)
However I am getting the following error in PowerApps, this is before the Flow is even triggered.

'TriggerInputSchemaMismatch' Message: The input body for the trigger 'manual' of type 'Request' did not match its schema definition. Error details: String 13/5/2022 does not validate against format date
It looks like the output from SelectedDate is a string rather than a Date format, is there an easy way I can convert this in the Flow command so it's passed to Flow in a format it's happy with?
Any help gratefully received.
Rob