I can’t print from my iPhone or iPad, it says no AirPrint printers found

One of the first things to try would be a full power-cycle sequence:

Power off the Wi-Fi router, the printer, the iPhone and the iPad, and all other computers and devices. Wait two to three minutes. Power on the router. Wait two to three minutes. Power on the printer. Wait a minute or two. Power on the iPhone and the iPad. Finally, power on all other computers and devices.

In case of further questions, please provide information about the exact printer model.

Hello Thomat7, If your checked your Wi-Fi router and is ok then checked your network settings on the Printer? You may need to re-enter your Wi-Fi network password on your printer. Sometimes if you take a power hit the printer settings may not stay when your power comes back on.