How can I restore iCloud Contacts and Photos without old iPhone

i lost my old phone in the middle of the sea i can’t get it back.

I always try to get my old icloud but they ask me for a code from my old phone and I can’t because he s in the middle of the sea

so i need to get my i cloud back i need my contacts and my photos hope you understand me thank you

[Re-Titled by Moderator]