I have a Yubikey 5, Yubikey 4, and a Feitian Bluetooth key, the Feitian is basically the unbranded Google Titan Bluetooth key. Both work fine, although I haven

I have a Yubikey 5, Yubikey 4, and a Feitian Bluetooth key, the Feitian is basically the unbranded Google Titan Bluetooth key. Both work fine, although I haven't used the Bluetooth one in a while. I use my Yubikey 5 on a regular basis. I use an iPhone 8.