Maybe you're lucky or maybe you have such a good cell signal everywhere that you've not noticed. For some reason, though, iPhones under iOS 12 can be prone to dropping their connection to a Wi-Fi
Your iPad's Wi-Fi icon -- which is located in the iPhone's status bar -- displays the strength of a Wi-Fi network's signal. The number of bars displayed in the icon corresponds to the signal's strength. If the signal strength is low, you need to move the device closer to the router to avoid losing the connection to the Wi-Fi network. iPad Keeps Losing Wifi Connection?? - Apple Community 2014-7-26 How to Keep an iPad From Dropping Wi-Fi Signals | Small
Fixed: Apple TV Airplay Keeps Dropping Connection
11 Ways to Fix iPhone/iPad Keeps Dropping WiFi after Update 2019-10-25 · 1. Check and Restart Your Wi-Fi Router. First, use other devices to try connecting to the same Wi-Fi network. If it turns out not only your iPhone/iPad loses Wi-Fi connection constantly but also other phones and tablets, rebooting your WIFI router may be helpful. Now try to reboot the router/modem to fix Wi-Fi keeps dropping on iPhone: Step 1 ipad keeps losing wifi connection - Apple Community
ipad keeps losing wifi connection - Apple Community
Wi-Fi connection drops constantly on iPad 2