It supports Apple CarPlay via wifi/BT and also via a lighting cable. CarPlay will automatically display when you enter the car. You can also use wired
Audi A3 8V) Wireless CarPlay & Android Auto MMI Module For Audi A3
Wireless Apple Carplay Android Auto Interface Adapter For Audi A3
Audi A3 8V Wireless Carplay & Android Auto Box - MAK Coding
Audi A3 8V Wireless Apple CarPlay Android Auto MMI Interface Unit
Andream Wireless CarPlay Android Auto MMI Prime For BMW CIC NBT
Audi A3 8V) Wireless CarPlay & Android Auto MMI Module For Audi A3
AUDI WIRELESS APPLE Carplay Android Auto Interface Retrofit A4 A5
AUDI A3 2013-2019 (8V) Retrofit CarPlay and Android Auto Kit
Audi A3 - Apple Carplay + Android Auto upgrade
JOYEAUTO Wireless Carplay Android auto Retrofit Kit
Audi A3 8V Wireless Carplay & Android Auto Box - MAK Coding