how do i restore calendar widget on my iphone 12?

Hello venusmedati,

Thank you for posting in Apple Support communities. We understand that you are trying to restore your calendar widget on your iPhone. We would love to provide you support on this. 

We see that you used an article to create this post and although thats a great article to restore your calendar it doesn't quite help with the widgets.

This resource will tell you how to add a Calendar widget to your Home Screen: Use widgets on your iPhone and iPod touch

Thank you for allowing us to support you.

Have an awesome and productive day!