I have full access to my mom's phone

When my mom bought her phone, I did everything. Passed the contacts, added her email account, downloaded her social media, set up a password, and did the biometry. So obviously I put my digital too. She didn’t know, and got really surprised when I had full access to her bank app. The other day I had to go mark an appointment for her to make a new ID, everything involved her CPF (Social Security Number), which I memorized years ago, and her email. But for some reason I didn’t have it on my phone, so I had to call her because a code was going to be sent to her number. I did that because I know mom never even entered her email, but what was my surprise when she didn’t know how to enter in her messages app either? (For reference, we are brazilians, we use WhatsApp. The only time we use our messages is to code verifications and things like that.) I had to keep telling her to >not< open the Messenger. It was mostly quiet at the place, with the exception of me telling mom “Please, don’t open…