> Using passkeys does not mean that you have to use your phone every time you sign in. If you use multiple devices, e.g. a laptop, a PC or a tablet, you can create a passkey for each one. In addition, some platforms securely back your passkeys up and sync them to other devices you own. For example, if you create a passkey on your iPhone, that passkey will also be available on your other Apple devices if they are signed in to the same iCloud account. This protects you from being locked out of your account in case you lose your devices, and makes it easier for you to upgrade from one device to another.
> If you want to sign in on a new device for the first time, or temporarily use someone else's device, you can use a passkey stored on your phone to do so. On the new device, you’d just select the option to "use a passkey from another device" and follow the prompts. This does not automatically transfer the passkey to the new device, it only uses your phone's screen lock and proximity to approve a one-time sign-in. If the new device supports storing its own passkeys, we will ask separately if you want to create one there.