Phone number and email access, if you can regain access to them.
It is definitely a good idea to plan in advance and set up a recovery contact: https://support.apple.com/en-us/102641
But email access is protected by MFA based on your destroyed device. Recovery codes are also stored in the same destroyed building.
But email access is protected by MFA based on your destroyed device. Recovery codes are also stored in the same destroyed building.