You haven't lost your motivation. You've lost track of why you do things.
You've tried to-do lists, morning routines, reminders on your phone. You've read articles about discipline, watched videos about habits. And for a few days, it worked. Then nothing.
Advice about motivation starts from a false premise: that you're missing something. Discipline, energy, technique. In reality, a drop in motivation is a signal. It says something about your relationship with what you're doing.
It's not a willpower problem
There's a difference between not feeling like doing something and no longer knowing why you're doing it. The first situation asks for discipline. The second asks for clarity. And most people trying to "get motivated again" are in the second situation without knowing it.
Instead of looking for how to get yourself motivated, the question that produces a result is: what are you waiting to happen before you act? That wait is often what's blocking you.
Motivation is just a symptom
What you just did is make visible the permissions you're not giving yourself. Most people who "lack motivation" aren't missing anything: they're waiting for a condition that may never come.
The exercise only covers one angle. There's also what drains you for no obvious reason, and deeper blocks that have been replaying for years. To go further: identifying what's draining you beyond the to-do list.