Square notification then became rounded in ios 16

Hello t_va,

Thank you for reaching out in Apple Support Communities. To help troubleshoot this behavior, please restart your iPhone as it can help resolve unexpected behavior. Once you restart your iPhone, let's see if the notifications appear as expected.

Here's how: Restart your iPhone - Apple Support

"How to restart your iPhone X, 11, 12, 13, or later

1. Press and hold either volume button and the side button until the power-off slider appears.

2. Drag the slider, then wait 30 seconds for your device to turn off. If your device is frozen or unresponsive, force restart your device.

3. To turn your device back on, press and hold the side button (on the right side of your iPhone) until you see the Apple logo."

We look forward to hearing back from you with an update.

Kind regards.

Hi there t_va,

Thanks for letting us know. Another step you could always see if updating iOS as updating to the latest iOS can resolve any issues that might be present in the previous iOS. If needed, the steps below show how:

"Update your iPhone or iPad wirelessly

1. Back up your device using iCloud or your computer.
2. Plug your device into power and connect to the internet with Wi-Fi.
3. Go to Settings > General, then tap Software Update.
4. If you see more than one software update option available, choose the one that you want to install.
5. Tap Install Now. If you see Download and Install instead, tap it to download the update, enter your passcode, then tap Install Now. If you don't know your passcode, learn what to do."

Those steps are from this article: Update your iPhone or iPad - Apple Support

If you continue to encounter this issue after those steps, you can contact Apple Support for further assistance. You can reach out with the following link: Contact - Official Apple Support

Take care.