New mailbox sensor installed, next to useless without a sharing option

So, I was all excited to tell my wife that she can finally stop wondering when the mail is delivered. Ring will let us know... how wrong I was. Install went smoothly as could be expected, little miffed that I needed yet another bridge for low power devices, installed right next to the range extender for my alarm sensors, but that's mild irritation compared to the discovery that I cannot share the new mailbox sensor with my wife who has seperate account due to the 2 factor nonsence that Ring has started to enforce. As per the app, grouped devices cannot be shared, so why enforce a mailbox sensor to be within a nonexsting light group (I do not have any ring lights) making it useless for households with more than one adult who would be interested to know when they should check the mail... Unless I'm doing something wrong, or missing something basic, I'm on the verge of sending the whole thing back. While on the subject of sharing, why can't my wife star flag the ring videos of interest???