We are not able to support older versions of Xcode currently but it’s something we’re looking into.
It does appear as if there are workable solutions here: Version 3.0.1 fails to build on XCode 14.3 · Issue #228 · havesource/cordova-plugin-push · GitHub
We have seen a fair amount of plugin breakage with newer versions of Xcode/iOS and we suggest looking for plugins that are maintained. @havesource/cordova-plugin-push has not had a release in over a year, and the maintainer seems absent. It’s unclear if this plugin is actually compatible with newer versions of iOS in it’s current form. It might be best to find another solution, or work with one of the devs who’s mentioned forking it in the issue.