notification only show when my iphone se is connected to power. how do i see them all the time?

Hello oran211,

Thank you for providing that information. If the mail account has notifications set to "Fetch New Data Automatically" this behavior would be expected. This setting would have your device fetch new data in the background only when your device is charging and connected to Wi-Fi.

Check out the "Check Mail Fetch and Notification settings" section of this link for more information: If you can't receive email on your iPhone, iPad, or iPod touch

In this case, we'd recommend setting your accounts to fetch new data on a schedule, or set it to push if it's available.

Regards.

Hello oran211,

Welcome to Apple Support Communities. We understand that you're not receiving notifications unless your iPhone SE is connected to power.

First, we'd recommend making sure that your device is updated to the latest version of iOS (14.4.2). Update your iPhone, iPad, or iPod touch

After updating your device, be sure that each of your app updates are installed as well. How to manually update apps on your Apple device

If you continue to experience issues, let us know which apps appear to be affected, and which type of notifications you're not receiving (ex. Lock screen, Notification Center, Banners).

Also, check out the "If you don't see notifications for a specific app" section of Use notifications on your iPhone, iPad, and iPod touch to ensure that notifications settings for each of the impacted apps are set correctly.

Cheers!