My feedback reiterates what you're hearing about the cogintive load being unruly. If you want to "beat" doom scrolling, you need your mechanics to be as simple -- quick swipes and taps.

One potential direction, simple cards that are True/False.

If you want to beat doom scrolling, put your phone down?

Directed learning towards some goal is always going to be useful. These replacements for doom scrolling are addressing a surface level issue. Just change your habit to be spaced repetition on flash cards.