what to do if you don't remember your recovery key

I have had my phone for 5+ years, I dont remember ever creating a recovery key, I bought a new phone and when attempting to transfer info over, it required a recovery key, in which I did not remember creating one, therefore I do not remember saving one. How do I get another one? I'd rather continue to use my Iphone 8 and return my Iphone 14 than attempt to manually transfer 5+ years of information to a new phone?