This roundup concluded that the evidence is not particularly strong:

"In short, there is no convincing evidence that playing Tetris actually helps people. The studies have methodological problems, tiny sample sizes, and have failed to replicate. Some found a reduction in “intrusive memories,” but no improvement in outcomes of PTSD or distress."

https://www.madinamerica.com/2021/10/tetris-trauma-viral-twi...

That was a great article. Thank you.