I share your frustration. Both of my parents have multiple sheets of paper next to their computers with “all” of their papers written on them, but when they need tech sorry (i.e., me), the password they need it never on there.
Have you considered the possibility that this could be a subconscious act by your mom to communicate with you, a way to ensure she gets to talk to you more frequently than otherwise?
MarieMarion@literature.cafe 8 minutes ago
My mom, every time she needs to re-enter her Gmail password: “I’m pretty sure there’s never been a password on my email thing.”