A denial isn't the end. You have 60 days to file a Request for Reconsideration...

https://www.generate-bookmark.win/receiving-a-denial-letter-is-overwhelming-but-take-a-breath-you-have-exactly

A denial isn't the end. You have 60 days to file a Request for Reconsideration (SSA-561). Don't just list medical diagnoses. Focus on your functional limits instead. Show exactly how your symptoms stop you from working an eight-hour shift