My iPhone and iPad aren’t connecting wifi?

You may try some of these steps, please chack after each step....

1. Forget and reconnect to the Wi-Fi network: On your iPhone and iPad, go to Settings > Wi-Fi, find your Wi-Fi network in the list, tap the "i" icon next to it, and then tap "Forget This Network." Afterward, reconnect to the Wi-Fi network by selecting it from the list and entering the password.
2. Sometimes, a simple restart can resolve temporary software glitches. Turn off your iPhone, wait for a few seconds, and then turn it back on.
   1. Restart the device. That's it.
   2. Still not solved --> Force restart iPhone - Apple Support
3. If the issue persists, you can try resetting all settings on your iPhone. This will not erase your data but will reset all personalized settings to their default values. Go to Settings > General > Transfer & Reset > Reset > Reset All Settings and confirm the action. Note that you will need to reconfigure your settings afterward. All settings—including network settings, the keyboard dictionary, the Home screen layout, location settings, privacy settings, and Apple Pay cards—are removed or reset to their defaults. No data or media are deleted.
   1. Reset All Settings: Return iPhone settings to their defaults - Apple Support:- Return iPhone settings to their defaults
   2. You can return settings to their defaults without erasing your content.
   3. If you want to save your settings, back up your iPhone before returning them to their defaults. For example, if you’re trying to solve a problem but returning settings to their defaults doesn’t help, you might want to restore your previous settings from a backup.
4. Make sure you have the latest updates installed.
   1. Update Over-the-Air (OTA) —> Update your iPhone or iPad - Apple Support (IN)
   2. Update using iTunes/Finder —> Update your iPhone, iPad, or iPod touch - Apple Support (IN)

If none of the above steps resolve the issue, it is recommended to reach out to Apple Support or visit an authorized service center for further assistance. They can provide specific guidance based on your device model and iOS version.

It may be possible that the router has barred or blocked your device's MAC address on your router has. The MAC address is a unique identifier assigned to each network interface card (NIC) in a device. By blocking a specific MAC address on the router, you can prevent that device from connecting to your Wi-Fi network.

The process of blocking/unblocking a MAC address varies depending on the router's manufacturer and model. Here are general steps to block a MAC address on most routers:

1. Open a web browser on a device connected to the router's network and enter the router's IP address in the address bar. You can usually find the router's IP address on the bottom of the router or in the router's manual.
2. Enter the router's username and password when prompted. If you haven't changed them, the default credentials are often found on the router or in the router's manual.
3. The location of these settings may vary depending on the router's interface. Look for a section related to "MAC filtering," "Access Control," "Wireless Security," or similar.
4. In the MAC filtering or access control settings, there should be an option to add a MAC address to the blocked list or delete a Mac Address from the blocked list. Enter the MAC address of the device you want to block/unblock and save the changes.
5. Apply the changes and restart the router: Once you have removed/added the MAC address to the blocked list, save the settings and apply the changes. Some routers may require a restart for the changes to take effect.

After blocking the MAC address on the router, the device with the blocked MAC address will no longer be able to connect to the Wi-Fi network. Keep in mind that MAC address blocking is not foolproof, as MAC addresses can be spoofed or changed on some devices. For enhanced security, it's recommended to use additional authentication methods such as strong Wi-Fi passwords and encryption protocols.