Models that support Sidecar
iPad models:
iPad Pro (all models)
iPad Air (3rd generation and later)
iPad (6th generation and later)
iPad mini (5th generation)
Mac models:
MacBook Pro (introduced in 2016 or later)
MacBook Air (introduced in 2018 or later)
MacBook (introduced in 2016 or later)
Mac mini (introduced in 2018 or later)
iMac Pro (introduced in 2017 or later)
iMac (introduced in late 2015 or later)
Mac Pro (introduced in 2019)