Is there a best practice for direct access to all steps of a multi step process on mobile

I'm working on a multi step process in an Android App and I wonder if there is good solution out there to enable the user to access all (3 maybe 4) steps without wasting too much screen estate.

My process is like this:

In Step 2, the user is working on a long list of items, like a todo-list. Processed items move to the finished tab and can be reviewed an undone from there. Once the list is empty, it shows a button to move on to the next Step.

But the user may decide to move on without finishing the whole list and the user may want to revisit Step 1 from Step 3. I thought about a bottom navigation or some other additional navigation bar with access to all steps, but in Step 2 you than have Tabs and some similar looking element and if I also keep the standard android top bar there might be not enough room for the list.

I have 2 ideas: Adding a menu to access all steps. I hesitate using the three dots context menu icon here, because this interaction seems too important to me...

Or working on a custom top bar that shows all steps.

What do you think?