I think the level of security provided by passwords or password managers is probably of little import, when confronted by a nation-state actor, and indeed a top tier nation-state actor, with nigh unlimited resources, and an axe to grind over a serious grudge.

We have wi-fi routers being used to passively see through walls, with enough fidelity to read lips and record finger movement.

Put someone under a microscope long enough, and every single password they use will reveal itself. Whether locked behind a manager app (sooner or later you'll snag the master password for it) or directly entered.