Here you can find instructions to make video calls on Apple devices

Apple iPad 3 Wi-Fi + Cellular Apple iPad 3 Wi-Fi + Cellular
Apple iPod Touch (2019) Apple iPod Touch (2019)
Apple iPad Pro 12.9 (2017) Apple iPad Pro 12.9 (2017)
Apple iPad mini (2019) Apple iPad mini (2019)
Apple iPad Pro 11 Apple iPad Pro 11
Apple iPad 4 Wi-Fi + Cellular Apple iPad 4 Wi-Fi + Cellular
Apple iPad 4 Wi-Fi Apple iPad 4 Wi-Fi
Apple iPad 10.2 Apple iPad 10.2
Apple iPad mini Wi-Fi + Cellular Apple iPad mini Wi-Fi + Cellular
Apple iPad 9.7 (2018) Apple iPad 9.7 (2018)
Apple iPad Pro 12.9 (2015) Apple iPad Pro 12.9 (2015)
Apple iPad mini Wi-Fi Apple iPad mini Wi-Fi
Apple iPad Pro 11 (2020) Apple iPad Pro 11 (2020)
Apple iPad Pro 12.9 (2018) Apple iPad Pro 12.9 (2018)
Apple iPad mini 4 (2015) Apple iPad mini 4 (2015)
Apple iPad Wi-Fi + 3G Apple iPad Wi-Fi + 3G
Apple iPad Pro 12.9 (2020) Apple iPad Pro 12.9 (2020)