How to bypass iphone from asking for passcode to phone that I no longer have nor remember the passcode to

When I select "don't know iphone passcode?" option, it brings me to the list of old devices. There is no option to delete them, and when I then select "forgot all passcodes?" it just says "if you can't remember the passcode for any of your devices, you can still sign in but you won't be able to access any passwords or other end-to-end encrypted data stored in icloud." that's it, gives me no other options. Whenever I try to set up a security key or try anything else at all, it still asks me for this other passcode no matter what. I cannot finish a data sync or anything. I don't care about the data from my old devices. This is the first time in 10 years I have had an iphone so don't need any of it, and is why I don't remember the old device passcode.