Biometric
Strong biometric authorization may be reused for private-key operations during the fixed interval. The interval starts with successful authentication and never slides on signing.
New biometric enrollment does not invalidate this key. Android can independently read back this interval from native KeyStore metadata after creation or restoration. iOS configures it in Signum, but Signum's pinned public API does not expose an effective positive timeout after restoration for independent readback.
Timed reuse is recent platform or provider authentication. It is not authorization or consent for issuance, presentation, or another wallet action, and is not guaranteed to be key-local.