Well, I used the c3 service and built a signed apk but, in play console, I chose the option, which let google manage my keys, when I've uploaded my apk in alpha stage.
App bundle is cool, but I'm not sure it has many advantages for Construct yet. App signing is good if your worried about losing your keystore or access to it, but that can be solved by good backup strategies. It also has the downside that you still have to have a keystore for signing ( they check that it was you that signed the APK then resign it ). Also your key signature will be different, making testing anything to that uses Google Auth ( Play services for instance ) awkward.
What do you mean by awkward? My key signature that I got on export will be different how?
Well, if the only benefit is the backup security that google can provide, I believe I'm not using it then. Gonna have to start again but, since It is in alpha with just 2 testers, I believe I can restart the process again with a new app project in Play Console, right?