The same member says there isn’t anything that doesn’t work in this ROM. He also gives specific instructions on how to flash it. There aren’t that many people using LineageOS 19.1 yet. As always, the latest OnePlus 7 and OnePlus 7T series OxygenOS 12 MP2 update is rolling out in a phased manner. Hence, it may take a couple of days before the update reaches all users.