Yubikey Security Key question

I want to buy a Yubikey to secure my Binance account but i have some questions left:

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1.) If i buy i Yubikey and secure with it my Binance account can i somehow take a backup of my Yubikey so in case my Yubikey gets somehow destroyed or i loose it i can somehow recover some kind of a Yubikey backup to a newly bought Yubikey???

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2.) If i cant somehow backup the Yubikey what would be a correct procedure to be on the safe side in case i loose control to my Yubikey?

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3.) Can i setup two or three Yubikey Security keys at the same time? So buying a Yubikey 5 NFC, Yubikey 5C NFC & a Yubikey 5Ci and set them all up to secure a Binance account? So i would use the 5Ci for my phone, the 5C for my MacBook and the other one would serve as a backup in case the other two get stolen?

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Thanks for every help

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George