Securing authenticator on lost device

[KevanGibbings]

I have lost my android mobile phone. I have recovered Authenticator on a replacement device from backup and have done the sensible things. Changed my password and forced all devices to logout.My phone is secured with a code and biometrics, but what is someone did gain access to it. Could they use it to approve logins?I know this is unlikely but is it possible? I have looked for a way to disable this device but cannot find anything, despite various post suggesting the is a way.Can this be done? If so how?Thanks Kev

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