Interesting

May I ask what is special about cobalt in B12 specifically? I've come to realize there are numerous inorganic substances inside my body like copper, gold etc. so cobalt by itself doesn't really stand out anymore.

Heard about it. I initially thought the universe should exist regardless whether someone is there to observe it or not...

...but then I also studied quantum mechanics, so I am not really in a position to say anything...

I sincerely thank you for understanding my situation and giving me actually useful advice.

I'm sorry, but I do not have the time, experience or knowledge to set up custom ROMs in my device at the moment.

Manufacturer's version of Android. I've logged in the apps with multiple Google accounts.

While I could consider using my browser instead of apps for all google related services, I don't think outright removing the accounts from my phone since Google has mandated use of mobile verification (the one where they ask to choose the correct option from the three given number) and I don't want to provide them a phone number for SMS verification. I fear I would be locked out of my Google accounts if I don't have them signed in in my phone directly.

I tried checking Shelter, however it says it is best optimized for Pixel phones and grapheneOS (which I have neither of) and you already said sandboxing in Android sucks, thus it may not be beneficial to go through all that effort to setting up the separate profiles if it isn't even going to work well.