Flex cable for iPhone 11 Pro Max A2218 Earphone speaker + Sensor.
Aftermarket Earpiece Speaker with Proximity Sensor Cable For iPhone 11 Pro Max (Warning: Irreparable Face ID Functionality) (Aftermarket)
The sensor is supposed to sense when your face is close and shut the screen off, while the earpiece speaker controls the sound during a call.
If both of these parts are broken then making a phone call could be difficult.
Repair your iPhone 11 Pro Max so you could get back to making normal calls once again.
Compatible Versions:
iPHONE 11 A2218 (Global market)