When I updated to Xcode 16.2, I couldn't open it; every time I click to start, it crashes and exits, unable to enter Xcode as shown in the picture.
Unable to start Xcode after updating to 16.2.
Which version of MacOS ?
You should try to reinstall, maybe from a different site.
You can use: https://xcodereleases.com
This is my error image; I don't know if it will help you determine the problem.
Recommended
I see from your screenshot that your macOS version is 24A5289h, and this version is from the beta program before macOS Sequoia was released. You need to update to a released version of macOS Sequoia, or a much more recent beta, which is currently macOS 15.4 beta.
— Ed Ford, DTS Engineer