And Google definitely has no tools to link two accounts that are constantly accessed from the same location or IP address so this will definitely provide privacy in spite of using two devices that constantly stream your personal information to Google servers.
And risk getting your main account banned for registering multiple Google accounts. Also you will need a whole new phone number for these alternative accounts which can get expensive
Google's TOS has no objection to users registering multiple Google accounts. I checked this out long ago.
In fact, how could they? I currently hold Google Workspaces accounts at my community college and from my employer. In addition to these two, I also have a "main" personal account where I do most of my stuff, including my Android device. Then, I maintain two other separate accounts for volunteer work in various capacities.
So I have five accounts in total; in fact I've signed up to Google One and gathered three of them into my "family" group. Google actively encourages people to create as many accounts as we can handle. It's nothing like Facebook, which requires a 1:1 correspondence between humans and personal accounts.
