Question about Meross Garage door opener

A compatible photocell: it is best to enquire directly with the garage door manufacturer - the safest option.

The magnetic contact shows whether the door is closed. I can also open my door manually using a button or via HomeLink from the car, but the Meross opener doesn't like that. It then indicates that there is a blockage, which is not the case. But it still works.

Yes, the device comes with a magnetic sensor.