A safari browser session keeps showing up on my google

I search the web on my iPhone with chrome, and chrome is set as my default browser. However, a safari session shows up on my google security both through my iPad and iPhone. I don’t open the safari app or log in with my google credentials. I’ve changed my google password three times. I have two step authentication. I’m wondering if another device is continuing to get into my google account? Or? Do apple product automatically open the safari browser? How are they logging in through my google account without my permission? I e signed out of all these accounts, but I’m freaking out thinking someone has hacked my account with something more malicious.

[Re-Titled by Moderator]