While Apple historically restricted large software updates to Wi-Fi, you can download using cellular data, especially if you have a 5G-enabled device or specific settings enabled. Quick Guide: How to Enable Cellular Updates
For most modern iPhones, follow these steps to bypass Wi-Fi requirements: : Go to the Settings app on your iPhone. Navigate to Cellular : Tap Cellular > Cellular Data Options . how to download ios 16 with cellular data
Ensure is selected in your Cellular Data Options . you can download using cellular data