Very sorry I got distracted and hadn't tested this sooner.
I can confirm that integrated clover fingerprint is not working.
I tried without Magisk root, then with Magisk; SafetyNet check fails in both instances.
On activating Mi Pad 4 China print via MHPC, SafetyNet passes again.
Both prints show identically as Xiaomi/clover/clover:8.1.0/OPM1.171019.019/V10.1.1.0.ODJCNFI:user/release-keys, but seems they must in fact differ... Perhaps there still a Security patch date mismatch? (ro.build.version.security_patch should = 2018-10-01). PW