Getting a denial letter is hard, but it is not the end. You have exactly 60...

https://www.normalbookmarks.win/got-a-denial-don-t-panic-you-have-exactly-60-days-to-file-form-ssa-561-for-a

Getting a denial letter is hard, but it is not the end. You have exactly 60 days to file your appeal. Start by submitting the SSA-561 form for Reconsideration. Don’t just list your medical diagnoses