How to update my iPhone
No
iPhone 7, iOS 14
No
iPhone 7, iOS 14
If you have indeed an iPhone 7, it cannot be updated to iOS 16 or 17 due to hardware limitations
If you want to update it to the latest version supported by your iPhone go to settings>general>software update
See this user tip that I have written about the update process for further reference
Updating/upgrading your iPhone - Apple Community
How to update my iPhone