Is it possible to view Google reminders on Android without the Google Calendar app? I use the Google reminders a lot, and I find the integration with the Google Calendar app very useful. However, other than that, third-party calendar apps are generally better, in my view, than the Google one.
Is there a way to view (and edit) reminders with third party calendar apps?
Unless you mean something completely other than event reminders: Of course it is possible. The Google Calendar app is nothing but a front-end: you can even delete its data, and your events (including reminders) will still be there.

On your Android device, events are managed by a "background service" and are stored with an app called "calendar storage", which is part of the Android OS. Every calendar app can (and most do) interface with that.

So just give it a try – you will find it works fine!