You definitely can initialize Yubikey OATH-TOTP with a known value in order to have multiple devices with identical secrets. I have done that, also see https://

You definitely can initialize Yubikey OATH-TOTP with a known value in order to have multiple devices with identical secrets. I have done that, also see https://support.yubico.com/hc/en-us/articles/360016614880-Can-I-Duplicate-or-Back-Up-a-YubiKey- https://support.yubico.com/hc/en-us/articles/360016614880-Ca...