Maximum number of yubikey assigned that can be assigned to one Entra Account

Question

I was looking for clarification on the number of yubikey fido2 that can be assigned to one Entra Account under Security Info. I have read article that 10 is the maximum keys that can be assigned to one account. Is this correct or is there another limit. Thanks

https://support.microsoft.com/en-gb/account-billing/set-up-a-security-key-as-your-verification-method-2911cacd-efa5-4593-ae22-e09ae14c6698