you can approve login requests using notifications but you need at least one backup trusted phone number on your account see step 2: https://support.apple.com/

you can approve login requests using notifications but you need at least one backup trusted phone number on your account see step 2: https://support.apple.com/en-au/HT204915 https://support.apple.com/en-au/HT204915 "trusted phone number" is an oxymoron