Oddbean new post about login | logout Im too new to know. I get signal notifications as it runs in tbe backgrouns. Im not sure since i think google plah services usually handles push. I try to not use push. My graphene is basically a dumb phone, at least thats my joke. I like it that way - less screen time.
It depends, if you have (the sandboxed version of) Google Play services installed on it then it'll handle push notifications just like on any other device. If it's not installed some apps (e.g. Signal) can run in the background and check for updates on their own, some apps can work with your own push notifications server (such as setting up a UnifiedPush setup), and some apps just won't get notifications if they don't support the latter two.