I don't think you do. My Mac Mini has the same Secure Enclave as other devices with the M4/A18 SoC, and it literally doesn't have a fingerprint reader (or Face ID).
The Secure Enclave is used to handle data around biometrics, but biometrics aren't a requirement for its use.
Biometrics on Apple devices are generally a convenience method so that you don't have to type your strong password every time, they're not a second factor to the password.