Wi-Fi
My phone keeps disconnecting from Wi-Fi network
iPhone 11 Pro Max, iOS 14
See if anything here helps.
To learn how to 'Connect to Wi-Fi on your iPhone, iPad, or iPod touch', click here --> https://support.apple.com/HT202639
If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi network,
click here --> https://support.apple.com/HT204051
Do you have a strong wifi connection signal? If you're at the edge of where the signal can reach it may be dropping occasionally.