If you ask Siri "Whose phone is this", Face ID/Touch ID will be disabled :)

To be clear, first it's OP's command "Hey Siri, whose phone is this?" and then Siri will display your name and picture, and then you say "Hey Siri, goodbye" to dismiss that popup (so someone waking your phone won't see what you did). OP's command is the one that disables Touch ID.