You can export from Photos as a JPEG. See here:
MacMost forum question: How Do I Change TIFF To JPEG In Photos? Gary, how do I convert my TIFF images to JPEG within Apple Photos?I have changed the setting within my iOS (iPhone 11) but not sure if similar can be done on my 2017 Mac...
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or, you can drag the photo to the Desktop, double click to open in Preview and then export as a JPEG.