Universal Control stopped working after macOS Sequoia 15.7.7 update on OCLP MacBook Pro 2016

Hi everyone,
I’m running macOS Sequoia 15.7.7 on a MacBook Pro 2016 using OpenCore Legacy Patcher. Universal Control with my iPad was working perfectly on 15.7.5, but after updating to 15.7.7 it stopped working completely.
AirDrop still works fine between the Mac and the iPad, so Wi-Fi/Bluetooth/iCloud do not seem to be completely broken. However, in System Settings → Displays, I don’t even get the “+” / Add Display option anymore, so the iPad does not appear as a Universal Control/Sidecar target at all.
Things I already tried:

Disabled and re-enabled Universal Control settings

Disabled and re-enabled Handoff on Mac and iPad

Restarted both devices multiple times

NVRAM reset

SMC reset

Re-ran OCLP Post-Install Root Patches

Rebuilt and reinstalled OpenCore to EFI

Since it worked on 15.7.5 and stopped immediately after 15.7.7, I suspect this might be an OCLP/Sequoia regression related to Universal Control or FeatureUnlock.
Has anyone else experienced this after updating to 15.7.7? Is there any known workaround besides downgrading back to 15.7.5 or waiting for an OCLP update?

Any help would be appreciated.

submitted by /u/Living-Brain-3389
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