Questions about 2FA (Especially Aegis) from someone who doesn't know about it

I started researching other forms of 2FA because I realized that SMS would be easy to access if I had my phone stolen, so I ended up finding out about authenticators and the risk of SMS verification. So after researching, I decided to use Aegis, but as I don't understand about this type of subject, my doubts are:

1 - At first I will download it on my main cell phone and leave it in the Samsung safe folder. I …

2fa aegis privacy questions