Check out Ionic’s official blog post on the topic if you haven’t already. It covers all the steps and notes which Cordova plugins may still trigger the rejection.
Firebase - consider migrating to Cap Community firebase plugins.
Nothing else stands out. Broadly speaking, review your plugin list - which ones interact with a WebView and/or the webview apis?
@netkow Can i have some Capacitor and Cordova plugins in the same project? At this point I’m thinking it must be these two plugins:
"cordova-plugin-firebase-analytics": "^5.0.0", "cordova-plugin-firebase-messaging": "^5.0.1",