Chrome, autofill, and biometric security
At the time of this writing (v87, Dec 2020), Chrome for Android doesn't support biometric-protected credential autofill.
This has been reported on Chromium Issue Tracker #1139045 - Security Feature: Only auto-fill passwords after user provides fingerprint or PIN on Oct 16, 2020, and acknowledged by a Chromium contributor.

Comment 4 by palmer@chromium.org on Tue, Oct 20, 2020, 5:36 AM GMT+7
[...]
we could potentially implement a feature where Chrome auto-fills passwords only after the user supplies their fingerprint or PIN. (Safari on iOS has this: https://support.apple.com/en-us/HT208109) I'll change this bug to a feature request.