If I am locked out of my iCloud account and don’t have the recovery key

According to Apple's support document:

This gives you more control of your account recovery methods and can help prevent an attacker from gaining access to and taking control of your account.However, if you lose your recovery key and can’t access one of your trusted devices, you'll be locked out of your account permanently.

When you turn on Advanced Data Protection for iCloud, the majority of your iCloud data uses end-to-end encryption — which means that Apple doesn't have the encryption keys needed to help you recover that data. Therefore, you need to set up at least one alternative recovery method — either a recovery key or a recovery contact.

If you use Advanced Data Protection and set up both a recovery key and a recovery contact, you can use either your recovery key or recovery contact to regain access to your account.

Set up a recovery key for your Apple ID - Apple Support

If you have another trusted device logged into your account, you can generate a new key. See the article above.

I am locked out oy icloud accidentally deleted my number from trusted devices and don't have any other trusted devices