There used to be a section on the right side of xib file to select a UI control (e.g. button, checkbox, text area, etc) from menu, and add to xib file, but just after upgrading to XCode 14.1, the option is gone?? couldn’t find it anywhere…
Previously it looks like this:
There’s a plus sign in the upper right corner. See screenshot:
Then this should pop up. You can drag and drop what you want onto the storyboard.