Scan the QR code with your phone.
>What if I can't use cross-device authentication because I'm on a locked-down work machine or one that simply doesn't have bluetooth?
Most devices today ship with Bluetooth and even locked down machines support using your personal phone to authenticate.
>What if I want to consolidate them all in one platform just for the sake of being organised?
Then do that. Use whatever your phone uses.
>What if I lose or simply don't have the device with a certain passkey near me?
Then you will need to use a fallback authentication mechanism or will need to wait until you can get the device. TOTPs have the same issue.
Scan the QR code with your phone.
>What if I can't use cross-device authentication because I'm on a locked-down work machine or one that simply doesn't have bluetooth?
Most devices today ship with Bluetooth and even locked down machines support using your personal phone to authenticate.
>What if I want to consolidate them all in one platform just for the sake of being organised?
Then do that. Use whatever your phone uses.
>What if I lose or simply don't have the device with a certain passkey near me?
Then you will need to use a fallback authentication mechanism or will need to wait until you can get the device. TOTPs have the same issue.