Nicely detailed help page. I’ve done all the recommended measures dozens of times over several years to no avail. My iPhone 12Pro w iOS 16.2 auto joins my network when entering the house with Wifi already turned on, but NOT when Wifi is turned on AFTER coming into network range despite all troubleshooting and reset measures mentioned. This was the case with my previous iPhone 6S Pro as well. Other network devices, of which I have more than 50, all join reliably when turned on in network range so I would rule out the Asus AiMesh system as a blocker or unreliable. Any other ideas?
3 Ways to Fix iPhone Not Automatically Connecting to Wi-Fi
Facing the problem of your iPhone not automatically connecting to WiFi? Read this guide to know more and resolve the issue!